11 301 221 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 2⁶⁸

P-1

B1 =	3500000
B2 =	2637830910

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2002-07-27	Terry S. Arnold	0FD0D0D896D100F6	5749435
Verified	2004-03-16	Maria C. Sanchez	0FD0D0D896D100F6	81583

History

Date	User	Type	Result
2024-11-17	TheJudger	NF	no factor from 2^72 to 2^73
2024-06-21	MooMoo2	NF-PM1	B1=3500000, B2=2637830910
2021-11-02	SRBase	NF	no factor from 2^71 to 2^72
2021-08-15	SRBase	NF	no factor from 2^70 to 2^71
2021-08-06	SRBase	NF	no factor from 2^69 to 2^70
2017-12-27	ramgeis	NF	no factor from 2^68 to 2^69
2017-12-27	ramgeis	NF	no factor from 2^67 to 2^68
2016-01-04	VictordeHollander	NF	no factor from 2^66 to 2^67
2015-02-10	Numberwang	NF	no factor from 2^65 to 2^66
2014-05-30	HBendtz	NF-PM1	B1=600000, B2=12000000, e=12
2013-11-19	lycorn	NF	no factor from 2^64 to 2^65