2 925 889 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
1175088873484911330503	22	70.0	2015-04-25 17:20:13
331254993805527369007681	24	78.1	2015-04-25 17:20:12

ECM

Digits	B1	Curves
25	50000	113 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Doug Nickel	64522CBB4DCFFC40	0
Verified (Factored)	1999-05-16	Cristian Feier	64522CBB4DCFFC40	325842

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-30	alpertron	B0BAE760C812D3B2	2	0	1	3
Verified	2017-11-18	Oliver Kruse	B0BAE760C812D3B2	2	735957	1	3

P-1 factors

Date	Factor	B1	B2
2015-04-25	331254993805527369007681	1000000	20000000
2015-04-25	1175088873484911330503	1000000	20000000

History

Date	User	Type	Result
2017-11-18	Oliver Kruse	C-PRP	M2925889/331254993805527369007681/1175088873484911330503 : B0BAE760C812D3B2 PRP: Verified PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M2925889/1175088873484911330503/331254993805527369007681 : B0BAE760C812D3B2 PRP: Verified PRP without proof (not generated)
2015-04-25	VictordeHollander	F-PM1	Factor: 389254057507188436999892294374608640536593543 / (P-1, B1=1000000, B2=20000000, E=12)
2015-04-25	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-25	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-08	markr	NF	no factor from 2^61 to 2^62
2010-11-12	markr	NF-PM1	B1=105000, B2=2283750, E=6
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61