Last visit was: 19 Nov 2025, 17:28 It is currently 19 Nov 2025, 17:28
Home
GMAT
Messages
Tests
Schools
Events
Rewards
Chat
My Profile
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
ashkrs
User avatar
Joined: 08 Jun 2007
Last visit: 21 Feb 2019
Posts: 282
Own Kudos:
340
GMAT 1: 680 Q48 V35
Posts: 282
Kudos: 340
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:14
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

History

Date
Time
Result
Not Attempted Yet
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
beckee529
User avatar
Joined: 11 Jun 2007
Last visit: 23 Feb 2012
Posts: 394
Own Kudos:
1,926
Posts: 394
Kudos: 1,926
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:20
Kudos
Add Kudos
Bookmarks
Bookmark this Post
ashkrs
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime
Show more


i say B

1) P can either be 1 or 2
1 not prime, 2 prime
not suff

2) P! is prime
2! = 2, prime
only 2 is possible, sufficient

i had a question though (might be silly).. for the second stmt is it possible for P to be negative? like for example: -5! is that possible?
User avatar
IrinaOK
User avatar
Joined: 22 Aug 2007
Last visit: 01 Jan 2008
Posts: 276
Own Kudos:
502
Posts: 276
Kudos: 502
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:25
Kudos
Add Kudos
Bookmarks
Bookmark this Post
ashkrs
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime
Show more


also B,

1st: can be either 1 or 2----> 1 is not prime, 2 is prime.
2nd: can be only 2--->prime
User avatar
IrinaOK
User avatar
Joined: 22 Aug 2007
Last visit: 01 Jan 2008
Posts: 276
Own Kudos:
502
Posts: 276
Kudos: 502
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:27
Kudos
Add Kudos
Bookmarks
Bookmark this Post
beckee529
ashkrs
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime

i say B

1) P can either be 1 or 2
1 not prime, 2 prime
not suff

2) P! is prime
2! = 2, prime
only 2 is possible, sufficient

i had a question though (might be silly).. for the second stmt is it possible for P to be negative? like for example: -5! is that possible?
Show more



recent discussion over prime being negative :)

https://www.gmatclub.com/forum/t53554
User avatar
beckee529
User avatar
Joined: 11 Jun 2007
Last visit: 23 Feb 2012
Posts: 394
Own Kudos:
1,926
Posts: 394
Kudos: 1,926
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:31
Kudos
Add Kudos
Bookmarks
Bookmark this Post
IrinaOK
beckee529
ashkrs
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime

i say B

1) P can either be 1 or 2
1 not prime, 2 prime
not suff

2) P! is prime
2! = 2, prime
only 2 is possible, sufficient

i had a question though (might be silly).. for the second stmt is it possible for P to be negative? like for example: -5! is that possible?


recent discussion over prime being negative :)

https://www.gmatclub.com/forum/t53554
Show more


hi irina, thanks for the link :)

what i am asking is not related to this question.. but just in general i wanted to know if we can have an expression -5! or negative factorial -x! (i know this cant work for perm/combin) but other than that... thanks in advance :)
User avatar
ashkrs
User avatar
Joined: 08 Jun 2007
Last visit: 21 Feb 2019
Posts: 282
Own Kudos:
340
GMAT 1: 680 Q48 V35
Posts: 282
Kudos: 340
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:35
Kudos
Add Kudos
Bookmarks
Bookmark this Post
beckee529
IrinaOK
beckee529
ashkrs
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime

i say B

1) P can either be 1 or 2
1 not prime, 2 prime
not suff

2) P! is prime
2! = 2, prime
only 2 is possible, sufficient

i had a question though (might be silly).. for the second stmt is it possible for P to be negative? like for example: -5! is that possible?


recent discussion over prime being negative :)

https://www.gmatclub.com/forum/t53554

hi irina, thanks for the link :)

what i am asking is not related to this question.. but just in general i wanted to know if can we have an expression -5! or negative factorial -x! (i know this cant work for perm/combin) but other than that... thanks in advance :)
Show more



factorials apply only to non-negative integers.

yes OA is B . I got D , the foolish way of equating just the exponents.
User avatar
IrinaOK
User avatar
Joined: 22 Aug 2007
Last visit: 01 Jan 2008
Posts: 276
Own Kudos:
502
Posts: 276
Kudos: 502
Is the integer P prime? (1) P^2=P^P (2) P! is prime Updated on: 09 Oct 2007, 21:53
Originally posted by IrinaOK on 09 Oct 2007, 21:36.
Last edited by IrinaOK on 09 Oct 2007, 21:53, edited 2 times in total.
Kudos
Add Kudos
Bookmarks
Bookmark this Post
beckee529
IrinaOK
beckee529
ashkrs
Is the integer P prime?

(1) P^2=P^P
(2) P! is prime

i say B

1) P can either be 1 or 2
1 not prime, 2 prime
not suff

2) P! is prime
2! = 2, prime
only 2 is possible, sufficient

i had a question though (might be silly).. for the second stmt is it possible for P to be negative? like for example: -5! is that possible?


recent discussion over prime being negative :)

https://www.gmatclub.com/forum/t53554

hi irina, thanks for the link :)

what i am asking is not related to this question.. but just in general i wanted to know if can we have an expression -5! or negative factorial -x! (i know this cant work for perm/combin) but other than that... thanks in advance :)
Show more


That is an interesting question, honestly, i did not know the answer myself. Look this is what i found

https://mathforum.org/library/drmath/view/60851.html

thus factorial can be only POSITIVE INTENGERS and ZERO.


Thank you for making me ask the question to myself :)
User avatar
beckee529
User avatar
Joined: 11 Jun 2007
Last visit: 23 Feb 2012
Posts: 394
Own Kudos:
1,926
Posts: 394
Kudos: 1,926
Is the integer P prime? (1) P^2=P^P (2) P! is prime 09 Oct 2007, 21:38
Kudos
Add Kudos
Bookmarks
Bookmark this Post
thanks for the link again :)



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderators:
Bunuel
Math Expert
105390 posts
GMATBusters
GMAT Tutor
1924 posts