4 836 269 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 =	10640508450

ECM

Digits	B1	Curves
25	50000	105 / 280

Estimated T-Level: 21.9 ⓘ

Status	Date	User	Residue	Shift
Verified	1998-09-13	Blaine Deal	8D03F21D427E6C94	0
Verified	2001-02-11	Craig Etter	8D03F21D427E6C94	1102713
Bad	2001-02-11	Craig Etter	03F42AEAD45C103D	1102713

History

Date	User	Type	Result
2023-01-04	Sid & Andy	NF-PM1	B1=4100000, B2=10640508450
2020-12-07	-Anonymous-	NF	no factor from 2^71 to 2^72
2020-12-03	-Anonymous-	NF	no factor from 2^70 to 2^71
2020-12-03	-Anonymous-	NF	no factor from 2^69 to 2^70
2020-12-03	-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
2017-02-02	Squeeky_Squirrel	NF-PM1	B1=300000, B2=9000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^61
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-07-19	snme2pm1	NF	no factor from 2^65 to 2^66
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
2011-09-28	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-11-21	Oscar Östlin	NF-PM1	B1=90000, B2=1822500, E=6
2010-05-01	markr	NF	no factor from 2^61 to 2^62