20210713, 22:20  #1 
Jul 2021
2^{2} Posts 
Is there anyway to submit nonprimes to the db?
Hi, I'm kind of new to this. I wrote a primality test program in Python and was wondering if there was any way to submit nonprimes I've discovered? For example 2^853496131 is nonprime with a factor 318150 lines long (it's python so it doesn't give the exact number unless expanded). Might cut down some work if we can flag the nonprimes.
thanks 
20210713, 22:27  #2 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
10011100011011_{2} Posts 
85349613 is not a prime number, thus is not part of the exponents that PrimeNet is tracking. So, you can't submit it here.

20210713, 23:07  #3 
Jul 2021
4_{16} Posts 
ah ok. What about for prime exponents?

20210713, 23:12  #4 
Mar 2019
2^{3}·5^{2} Posts 
For composite you can submit factors of to factordb.com, e.g. http://factordb.com/index.php?query=2%5E5051. It only tracks numbers up to several million digits, so your example exponent may be too large.

20210713, 23:30  #5 
Mar 2019
2^{3}×5^{2} Posts 
Also note that for composite some of the factors of are trivial to find, using the theorem here: https://en.m.wikipedia.org/wiki/Mers...ersenne_primes

20210713, 23:49  #6 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
3×47×71 Posts 
For prime exponents first look up the exponent to see if the factor is known. And look at how far the factoring has been taken to. And note that the factoring programs used are highly optimised. Also, nowadays, factoring on a cpu is a waste of the cpu, as gpus are so much better at factoring.
Yes you can submit found factors for prime exponents on the manual submissions page. Prime95 and other programs have a particular formatting that is used. I don't have the format handy. But if you look through the reference threads, linked to here: https://www.mersenneforum.org/showthread.php?t=24607 you may find it. Roughly it is Mxxxxxxxx has a factor yyyyyyyyyyyyyyyyyyyyyy Edit: Here is a line from another thread that shows a full way of submitting the data: UID: UserID/Machine, M104819381 has a factor: 574983783644612576435518337 (P1, B1=755000, B2=20983000) The underlined bits are optional, or to be used when appropriate. Last fiddled with by Uncwilly on 20210714 at 01:05 
20210714, 01:13  #7 
Jul 2021
2^{2} Posts 
Thanks, but I can't find where to submit it. Does it need to be emailed or PM'd?

20210714, 03:32  #8  
"Alexander"
Nov 2008
The Alamo City
3×11×23 Posts 
Quote:
Last fiddled with by Happy5214 on 20210714 at 03:32 Reason: Reformat number to match 

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