2 257 961 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
309107746200397440524353	24	78.0	2020-03-23 15:14:21

ECM

Digits	B1	Curves
25	50000	52 / 280

Estimated T-Level: 20.9 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Michiel van Loon	4BCD43CF3963946E	0
Verified (Factored)	1999-03-01	Scott Morgan	4BCD43CF3963946E	826488
Verified (Factored)	2018-04-24	kkmrkkblmbrbk	4BCD43CF3963946E	1836947

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-24	Jinyuan Wang	60E7A6CE364A8895	1	98064	5	3
Verified	2020-03-26	Alvin Bunk	60E7A6CE364A8895	1	445790	5	3

History

Date	User	Type	Result
2020-03-26	Alvin Bunk	C-PRP	M2257961/309107746200397440524353 : 60E7A6CE364A8895 PRP: Verified PRP without proof (not generated)
2020-03-24	Jinyuan Wang	C-PRP	M2257961/309107746200397440524353 : 60E7A6CE364A8895 PRP: Verified PRP without proof (not generated)
2020-03-23	daveward2005	F-ECM	Factor: 309107746200397440524353 / (ECM curve 1, B1=50000, B2=5000000)
2019-06-29	BigBrother	NF-PM1	B1=1000000, B2=20000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-24	kkmrkkblmbrbk	C-LL	4BCD43CF3963946E
2017-01-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-26	Joss	NF-PM1	B1=342144, B2=3421440, E=6
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-29	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-02	Joss	NF-PM1	B1=128426
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-04	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-05	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-12	Joss	NF-PM1	B1=30000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61