17 761 721 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 2⁶⁹

P-1

B1 =	1250000
B2 =	152521950

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2003-05-19	Matt Burns	EB0596D7E5BD7874	8002839
Verified	2007-05-28	Marc van Lohuizen	EB0596D7E5BD7874	4937802

History

Date	User	Type	Result
2023-04-29	Sid & Andy	NF	no factor from 2^72 to 2^73
2022-01-23	masser	NF-PM1	B1=1250000, B2=152521950
2021-09-21	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-10	SRBase	NF	no factor from 2^70 to 2^71
2020-12-07	James Heinrich	NF-PM1	B1=319000, B2=8846000, E=12
2020-04-08	lycorn	NF	no factor from 2^69 to 2^70
2018-03-18	ramgeis	NF	no factor from 2^68 to 2^69
2018-03-18	ramgeis	NF	no factor from 2^67 to 2^68
2014-08-23	Nesowa	NF	no factor from 2^66 to 2^67
2013-09-08	David Campeau	NF	no factor from 2^65 to 2^66