17 187 259 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 2⁷⁴

TF target 2⁶⁹

P-1

B1 =	1000000
B2 =	502981050

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2003-04-19	Silon	17BD427C85DA0C62	8323743
Verified	2007-03-04	ShigehiroUeno	17BD427C85DA0C62	15519377

History

Date	User	Type	Result
2022-10-06	alpertron	NF-PM1	B1=1000000, B2=502981050
2022-01-11	TheJudger	NF	no factor from 2^73 to 2^74
2022-01-11	-Anonymous-	NF	no factor from 2^73 to 2^74
2021-11-30	-Anonymous-	NF	no factor from 2^72 to 2^73
2021-09-18	-Anonymous-	NF	no factor from 2^71 to 2^72
2021-09-09	SRBase	NF	no factor from 2^70 to 2^71
2020-03-20	lycorn	NF	no factor from 2^69 to 2^70
2017-12-18	ramgeis	NF	no factor from 2^68 to 2^69
2017-12-18	ramgeis	NF	no factor from 2^67 to 2^68
2016-03-16	Mark Rose	NF	no factor from 2^65 to 2^66
2015-12-01	riccardo uberti	NF-PM1	B1=430000, B2=9000000, E=12
2014-09-09	Nesowa	NF	no factor from 2^66 to 2^67