Check Someone
 

2^97532235 - 1 as mersenne prime

Have you ever heard that for 2^p-1 to have a chance to be prime, p must be prime?

Your exponent ends with a "5". Surely, you were joking.

Don't call me Shirley!

[QUOTE=Batalov;378291]Have you ever heard that for 2^p-1 to have a chance to be prime, p must be prime?[/QUOTE]97532233 and 97532237 are not prime either, tough luck.

[QUOTE=Uncwilly;378302]97532233 and 97532237 are not prime either, tough luck.[/QUOTE]

Who knows, some might say it's a result of "Legend In Your Own Prime" syndrome. :smile:

The closest prime to his exponent is 97532257...a long way away.

I wonder if he might have had a transposition error on his exponent.

OP, 2^97532235-1 has factors of 7, 31, 13367, 23671, 164511353, 193707721, 761838257287, 13572264529177, a known 27-digit factor, and a known 36-digit factor to name a few.

[QUOTE=gd_barnes;378310]The closest prime to his exponent is 97532257...a long way away.

I wonder if he might have had a transposition error on his exponent.[/QUOTE]That has a [URL="http://www.mersenne.ca/exponent.php?exponentdetails=97532257"]factor.[/URL].

[QUOTE=Uncwilly;378311]That has a [URL="http://www.mersenne.ca/exponent.php?exponentdetails=97532257"]factor.[/URL].[/QUOTE]

No, I meant the closest number to his exponent that is prime. 97532257 is obviously prime and it is the closest prime to 97532235. :smile: What you said does beg a question though: What is the closest mersenne exponent to his exponent that has no known factors and has not been proven composite?

[CODE]97532177,71
97532273,71[/CODE]

mersenne prime
 

Sorry everyone but my Prime number was 2^975322357-1 forgot to write the 7 , silly error.

Same :poop:, different day.

2^975322357-1 has factors:
7432339208719
341117531003194129
1181791842810499862725484463029336207

[SPOILER]...or in other words all factors of 2^101-1, 2^2591-1, 2^3727-1...[/SPOILER]

[QUOTE=Nix007;378549]Sorry everyone but my Prime number was 2^975322357-1 forgot to write the 7 , silly error.[/QUOTE]

[URL="http://www.mersenne.ca/factor.php?n=975322357"]Try again[/URL], the exponent is not prime.