2 676 959 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
144669797524584478681	21	67.0	2016-06-12 19:59:51

ECM

Digits	B1	Curves
25	50000	95 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ken Kriesel	75ED637F4DCAEDAD	0
Verified (Factored)	1999-04-13	Ethan Hansen	75ED637F4DCAEDAD	767685

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-18	Oliver Kruse	838198908FE3B6EF	1	211672	5	3
Verified	2017-12-03	kkmrkkblmbrbk	838198908FE3B6EF	1	67934	5	3

P-1 factors

Date	Factor	B1	B2
2016-06-12	144669797524584478681	151874	4567500

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-03	kkmrkkblmbrbk	C-PRP	M2676959/144669797524584478681 : 838198908FE3B6EF PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2676959/144669797524584478681 : 838198908FE3B6EF PRP: Verified PRP without proof (not generated)
2016-06-12	Joss	F-PM1	Factor: 144669797524584478681 / (P-1, B1=151874, B2=4567500, E=6)
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-01-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-13	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-12-06	markr	NF-PM1	B1=105000, B2=2283750, E=6
2010-11-20	Joss	NF-PM1	B1=20000
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61