4 835 213 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷²

TF target 2⁶⁵

P-1

B1 =	4100000
B2 =	10597329600

ECM

Digits	B1	Curves
25	50000	112 / 280

Estimated T-Level: 22.0 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-07-05	Matt Light	565EBC0BFD212E0F	0
Bad	2000-03-22	Miall Cedilote	D97A1BAE4B5575CB	1004811
Verified	2001-04-08	Ars Technica Team Prime Rib	565EBC0BFD212E0F	115226

History

Date	User	Type	Result
2023-03-14	Sid & Andy	NF-PM1	B1=4100000, B2=10597329600
2020-12-07	-Anonymous-	NF	no factor from 2^71 to 2^72
2020-12-02	-Anonymous-	NF	no factor from 2^70 to 2^71
2020-12-02	-Anonymous-	NF	no factor from 2^69 to 2^70
2020-12-02	-Anonymous-	NF	no factor from 2^68 to 2^69
2018-05-08	ramgeis	NF	no factor from 2^67 to 2^68
2017-11-09	Yxinity	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^61
2015-07-19	snme2pm1	NF	no factor from 2^65 to 2^66
2015-06-28	David Campeau	NF-PM1	B1=1040000, B2=30160000, E=12
2015-01-05	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-05	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-12	Joss	NF-PM1	B1=68274
2011-09-28	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-07-16	USAFSS	NF-PM1	B1=55000, B2=921250, E=6
2010-05-02	markr	NF	no factor from 2^61 to 2^62