2 619 997 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
91420929212114621913839	23	76.3	2020-08-10 20:38:05

ECM

Digits	B1	Curves
25	50000	50 / 280

Estimated T-Level: 20.9 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Todd Reagan	9962B918FFCE5F2D	0
Verified (Factored)	1999-05-30	John Orchard	9962B918FFCE5F2D	1177900
Verified (Factored)	2018-07-07	kkmrkkblmbrbk	9962B918FFCE5F2D	453100

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-11	M Miller	77D1B0D5AC3DE96D	1	1532698	5	3

History

Date	User	Type	Result
2020-08-11	Grant McCracken	CERT	PRP Certification Proof certified good
2020-08-11	M Miller	C-PRP	M2619997/91420929212114621913839 : 77D1B0D5AC3DE96D PRP proof power = 7 PRP: Verified Proof certified good
2020-08-10	GAN	F-ECM	Factor: 91420929212114621913839 / (ECM curve 2, B1=50000, B2=5000000, Sigma=3490011807772438)
2019-10-14	masser	NF-PM1	B1=2619997, B2=26199970, E=12
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-07	kkmrkkblmbrbk	C-LL	9962B918FFCE5F2D
2017-08-30	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-26	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-17	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=124498
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-18	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-12-12	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61