7 856 231 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
518511247	9	28.9	old
138976726391	12	37.0	2008-09-08 03:40:38

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-05-23	_p95holder_	3F165AB746854F83	2	2212945	5	3
Verified	2019-10-26	Oliver Kruse	3F165AB746854F83	2	7393648	5	3

History

Date	User	Type	Result
2024-01-31	Stef42	NF-PM1	B1=950000, B2=1968826860
2019-10-26	Oliver Kruse	C-PRP	M7856231/518511247/138976726391 : 3F165AB746854F83 PRP: Verified PRP without proof (not generated)
2018-05-23	_p95holder_	C-PRP	M7856231/518511247/138976726391 : 3F165AB746854F83 PRP: Verified PRP without proof (not generated)
2008-09-08	Will Edgington	F	Factor: 138976726391