7 390 987 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
228105016603566566719	21	67.6	2018-07-23 10:43:48

ECM

Digits	B1	Curves
25	50000	6 / 280

Estimated T-Level: 20.1 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1999-06-06	Rick Heylen	24636D125A587F28	1492920
Verified (Factored)	2002-05-11	Angel Galan Galan	24636D125A587F28	6141244

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-07-24	_p95holder_	395F9B1699C0B996	1	3609934	5	3
Verified	2019-05-24	kkmrkkblmbrbk	395F9B1699C0B996	1	1162042	5	3

History

Date	User	Type	Result
2019-05-24	kkmrkkblmbrbk	C-PRP	M7390987/228105016603566566719 : 395F9B1699C0B996 PRP: Verified PRP without proof (not generated)
2018-07-24	_p95holder_	C-PRP	M7390987/228105016603566566719 : 395F9B1699C0B996 PRP: Verified PRP without proof (not generated)
2018-07-23	ramgeis	F	Factor: 228105016603566566719 / TF: 67-68*
2016-10-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2015-06-21	VictordeHollander	NF	no factor from 2^65 to 2^66
2013-11-22	David Campeau	NF	no factor from 2^64 to 2^65
2013-10-28	Nesowa	NF	no factor from 2^63 to 2^64
2011-04-09	James Heinrich	NF-PM1	B1=140000, B2=3080000, E=6