2 581 837 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
959999615699845982137	21	69.7	2020-08-07 18:35:35

ECM

Digits	B1	Curves
25	50000	54 / 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
Verified (Factored)		Mike Usher	E22C83722F05EF52	0
Verified (Factored)	1999-05-02	Michael Boss	E22C83722F05EF52	1507068
Verified (Factored)	2018-06-19	kkmrkkblmbrbk	E22C83722F05EF52	2068358

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-07	pew	05CB9BC99024C8E5	1	1068956	5	3
Verified	2020-08-08	marssystems	05CB9BC99024C8E5	1	2186320	5	3

History

Date	User	Type	Result
2020-08-08	marssystems	C-PRP	M2581837/959999615699845982137 : 05CB9BC99024C8E5 PRP: Verified PRP without proof (not generated)
2020-08-07	pew	C-PRP	M2581837/959999615699845982137 : 05CB9BC99024C8E5 PRP: Verified PRP without proof (not generated)
2020-08-07	mnd9	F-ECM	Factor: 959999615699845982137 / (ECM curve 3, B1=50000, B2=5000000, Sigma=4507738658917452)
2019-06-29	lycorn	NF	no factor from 2^67 to 2^68
2018-06-19	kkmrkkblmbrbk	C-LL	E22C83722F05EF52
2017-08-20	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-21	mikr	NF-PM1	B1=3200000, B2=112000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-08	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-20	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-10-10	markr	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-12	Joss	NF-PM1	B1=50000
2010-11-14	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61