2 962 819 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
159271975495574016529	21	67.1	2010-10-30 16:57:50

ECM

Digits	B1	Curves
25	50000	58 / 280

Estimated T-Level: 21.0 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Bad		Paul Wilson	55EFCD1D70A2D7BA	0
Verified (Factored)	1999-05-23	Yann Forget	4BA02FA8055D5D0A	119817
Verified (Factored)	1999-12-08	Team love_fest	4BA02FA8055D5D0A	2789248

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-26	Oliver Kruse	7E3C2F3D9226EA4F	1	2747679	5	3
Verified	2017-12-09	kkmrkkblmbrbk	7E3C2F3D9226EA4F	1	1602467	5	3

History

Date	User	Type	Result
2022-09-21	USAFSS	NF-PM1	B1=288000, B2=274843800
2017-12-09	kkmrkkblmbrbk	C-PRP	M2962819/159271975495574016529 : 7E3C2F3D9226EA4F PRP: Verified PRP without proof (not generated)
2017-10-26	Oliver Kruse	C-PRP	M2962819/159271975495574016529 : 7E3C2F3D9226EA4F PRP: Verified PRP without proof (not generated)
2010-10-30	markr	F-PM1	Factor: 159271975495574016529
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61