5 015 741 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 2⁷³

TF target 2⁶⁵

P-1

B1 =	4000000
B2 =	8989970220

ECM

Digits	B1	Curves
25	50000	162 / 280

Estimated T-Level: 22.9 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-06-20	David Cato	428F411845EA36AC	0
Verified	2000-04-12	Gary Hanson	428F411845EA36AC	1973817

History

Date	User	Type	Result
2022-05-07	Sid & Andy	NF-PM1	B1=4000000, B2=8989970220
2021-10-15	ATH	NF-PP1	Start=2/7, B1=2500000, B2=90000000
2021-04-04	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-04-02	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-04-01	-Anonymous-	NF	no factor from 2^70 to 2^71
2021-04-01	-Anonymous-	NF	no factor from 2^69 to 2^70
2021-02-15	TJAOI	NF	no factor from 2^68 to 2^69
2018-07-16	mikr	NF-PM1	B1=3600000, B2=120000000, E=12
2018-06-06	ramgeis	NF	no factor from 2^67 to 2^68
2017-02-10	Squeeky_Squirrel	NF-PM1	B1=300000, B2=9375000, E=12
2016-05-14	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^63
2015-07-23	snme2pm1	NF	no factor from 2^65 to 2^66
2014-11-12	Joss	NF-PM1	B1=67796
2014-08-31	lycorn	NF	no factor from 2^64 to 2^65
2014-08-29	kracker	NF	no factor from 2^63 to 2^64
2009-07-15	USAFSS	NF-PM1	B1=55000, B2=907500, E=6