17 999 389 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 =	2000000
B2 =	674206500

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

Status	Date	User	Residue	Shift
Verified	2003-05-19	Derek Westcott	0345399D12C2B4E7	4663805
Verified	2007-07-04	Graeme Pope	0345399D12C2B4E7	5263606

History

Date	User	Type	Result
2024-10-18	masser	NF-PM1	B1=2000000, B2=674206500
2022-01-11	TheJudger	NF	no factor from 2^73 to 2^74
2021-11-08	Dylan Delgado	NF	no factor from 2^72 to 2^73
2021-01-30	Yxinity	NF	no factor from 2^71 to 2^72
2020-04-17	timbit	NF-PM1	B1=410000, B2=16400000, E=12
2019-08-30	Yxinity	NF	no factor from 2^70 to 2^71
2018-02-16	Yxinity	NF	no factor from 2^69 to 2^70
2018-02-16	Yxinity	NF	no factor from 2^68 to 2^69
2018-02-15	ramgeis	NF	no factor from 2^68 to 2^69
2018-02-14	BloodERazor	NF	no factor from 2^67 to 2^68
2016-03-19	Mark Rose	NF	no factor from 2^66 to 2^67