Prime Numbers

[Guest]

Thank you guys for all the help you've been

Show that for the primes p = 5 and 7, 2p – 1 is a prime number (Don’t just say that they are. Find them explicitly and show that no factorization is possible). What are the associated perfect numbers? Again, be explicit.
(b) Show that on the contrary, 211 – 1 is not a prime number.

 

[Matt]

Show that for the primes p = 5...2p – 1 is a prime number.

9 is divisble by 3 and is therefore not prime.

Show that on the contrary, 211 – 1 is not a prime number.

210 is divisible by 2 and is therefore not prime.

 

[Guest]

crap, the post came out wrong, its 5^p

and 2^11

 

[DEBBIE3449]

I AM HAVING A HARD TIME FINDING PRIME NUMBERS.

 

[DEBBIE3449]

CAN SOMEBODY HELP ME. I AM HAVING A HARD READING MY REPLIES. I WENT TO FAQ AND THAT'S NOT HELPING ME OUT AT ALL. THANKS

BECAUSE I AM UNABLE TO READ ANY MESSAGES, MY E-MAIL ADDRESS IS HONEYBEAR_7703@MSN.COM. PLEASE HELP

 

[happy]

I'd advise against posting your email address on the main board. Thanks! :wink:

 

[DEBBIE3449]

O.K. THANKS FOR THE ADVISE.

 

[happy]

If you're having a specific problem with prime numbers, please post it in a new thread, not somebody else's.