2 627 789 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
996232075816789713059201	24	79.7	2021-03-10 22:06:37

ECM

Digits	B1	Curves
25	50000	97 / 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)		Charles Hanes	2824CD9A9741053B	0
Verified (Factored)		Renato Pelessoni	2824CD9A9741053B	0
Bad	1999-04-02	David Phillips	17260CB5CE97B937	2557909
Verified (Factored)	1999-08-22	Sunny Lo	2824CD9A9741053B	271252

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-03-11	riccardo uberti	C4C8D7FD12C8370C	1	2126642	5	3

History

Date	User	Type	Result
2021-03-11	curtisc	CERT	PRP Certification Proof certified good
2021-03-11	riccardo uberti	C-PRP	M2627789/996232075816789713059201 : C4C8D7FD12C8370C PRP proof power = 7 PRP: Verified Proof certified good
2021-03-10	daveward2005	F-ECM	Factor: 996232075816789713059201 / (ECM curve 4, B1=50000, B2=5000000, Sigma=1216166677928541)
2019-10-21	masser	NF-PM1	B1=2630000, B2=26300000, E=12
2019-04-01	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-27	mikr	NF-PM1	B1=8000000, B2=250000000, E=12
2017-09-01	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-18	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
2012-06-16	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-02-28	James Heinrich	NF-PM1	B1=300000, B2=8000000, E=12
2011-01-20	Joss	NF-PM1	B1=50000
2010-12-26	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-02-13	Sturle Sunde	NF	no factor from 2^60 to 2^61