2 277 553 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
91744734383255457841	20	66.3	2017-01-18 06:16:58

ECM

Digits	B1	Curves
25	50000	109 / 280

Estimated T-Level: 21.9 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Bad		John Durbetaki	B8981E9F8055307B	0
Verified (Factored)	1999-03-15	Lon Green	88FC6068D9948530	1419729
Verified (Factored)	1999-09-07	Jeremy Goulstone	88FC6068D9948530	967705

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-12	kkmrkkblmbrbk	F08AEA0E633720D0	1	2092376	5	3
Verified	2017-10-29	Oliver Kruse	F08AEA0E633720D0	1	801713	5	3

History

Date	User	Type	Result
2023-05-13	This -Anonymous-	NF-PM1	B1=800000, B2=40000000, E=12
2017-10-29	Oliver Kruse	C-PRP	M2277553/91744734383255457841 : F08AEA0E633720D0 PRP: Verified PRP without proof (not generated)
2017-10-12	kkmrkkblmbrbk	C-PRP	M2277553/91744734383255457841 : F08AEA0E633720D0 PRP: Verified PRP without proof (not generated)
2017-01-18	Conductor	F	Factor: 91744734383255457841 / TF: 66-67
2016-04-15	Joss	NF-PM1	B1=326592, B2=11831559, E=6
2016-04-07	Joss	NF-PM1	B1=326592, B2=5878656, E=12
2016-03-20	Joss	NF-PM1	B1=272160
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-11-01	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
2014-09-15	-Anonymous-	NF-PM1	B1=133181
2013-12-06	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-05-06	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-01	markr	NF-PM1	B1=105000, B2=2152500, E=6
2010-11-14	Joss	NF-PM1	B1=30000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-10	Sturle Sunde	NF	no factor from 2^60 to 2^61