2 555 027 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
336208915164775558463	21	68.2	2020-10-12 08:17:33

ECM

Digits	B1	Curves
25	50000	73 / 280

Estimated T-Level: 21.3 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-02-19	Nicolau C. Saldanha	95A1A002B429B029	0
Verified (Factored)	1999-07-30	Howard C. Taylor	95A1A002B429B029	985934
Verified (Factored)	2018-06-12	kkmrkkblmbrbk	95A1A002B429B029	1353480

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-10-12	mrh	BD754B8AB13AFADE	1	2256629	5	3

History

Date	User	Type	Result
2020-10-12	Albrecht Heeffer	CERT	PRP Certification Proof certified good
2020-10-12	mrh	C-PRP	M2555027/336208915164775558463 : BD754B8AB13AFADE PRP proof power = 7 PRP: Verified Proof certified good
2020-10-12	mnd9	F-ECM	Factor: 336208915164775558463 / (ECM curve 6, B1=50000, B2=5000000, Sigma=3134281735694946)
2019-05-27	TJAOI	NF	no factor from 2^67 to 2^68
2018-06-12	kkmrkkblmbrbk	C-LL	95A1A002B429B029
2017-08-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-03	mikr	NF-PM1	B1=3200000, B2=112000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2015-11-04	omylist	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
2013-10-25	lycorn	NF	no factor from 2^62 to 2^63
2011-11-22	c10ck3r	NF	no factor from 2^61 to 2^62
2011-04-10	James Heinrich	NF-PM1	B1=175000, B2=4068750, E=6
2011-01-09	Joss	NF-PM1	B1=50000
2011-01-03	Joss	NF-PM1	B1=30000
2010-12-19	Joss	NF-PM1	B1=20000
2009-01-31	Sturle Sunde	NF	no factor from 2^60 to 2^61