Check Someone

Nix007 · 2014-07-17, 00:45

2^97532235 - 1 as mersenne prime

Batalov · 2014-07-17, 01:42

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.

kladner · 2014-07-17, 02:35

Don't call me Shirley!

Uncwilly · 2014-07-17, 06:20

Quote:

Originally Posted by Batalov

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

97532233 and 97532237 are not prime either, tough luck.

Robert_JD · 2014-07-17, 07:46

Quote:

Originally Posted by Uncwilly

97532233 and 97532237 are not prime either, tough luck.

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

gd_barnes · 2014-07-17, 08:02

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.

Uncwilly · 2014-07-17, 08:35

Quote:

Originally Posted by gd_barnes

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.

That has a factor..

gd_barnes · 2014-07-17, 08:48

Quote:

Originally Posted by Uncwilly

That has a factor..

No, I meant the closest number to his exponent that is prime. 97532257 is obviously prime and it is the closest prime to 97532235.

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?

axn · 2014-07-17, 09:40

Code:

97532177,71
97532273,71

Nix007 · 2014-07-19, 02:30

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

Batalov · 2014-07-19, 02:49

Same

, different day.

2^975322357-1 has factors:
7432339208719
341117531003194129
1181791842810499862725484463029336207

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

2014-07-17, 00:45	#1
Nix007 Jul 2014 2 Posts	Check Someone 2^97532235 - 1 as mersenne prime

2014-07-17, 09:40	#9
axn Jun 2003 2·3·7·11² Posts	Code: 97532177,71 97532273,71

2014-07-19, 02:30	#10
Nix007 Jul 2014 2 Posts	mersenne prime Sorry everyone but my Prime number was 2^975322357-1 forgot to write the 7 , silly error.

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2014-07-17, 01:42	#2
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 9494₁₀ Posts	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.

2014-07-17, 02:35	#3
kladner "Kieren" Jul 2011 In My Own Galaxy! 2·3·1,693 Posts	Don't call me Shirley!

2014-07-17, 08:02	#6
gd_barnes May 2007 Kansas; USA 29·359 Posts	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.

2014-07-19, 02:49	#11
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 2×47×101 Posts	Same , different day. 2^975322357-1 has factors: 7432339208719 341117531003194129 1181791842810499862725484463029336207 ...or in other words all factors of 2^101-1, 2^2591-1, 2^3727-1...