2 748 857 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
2283574827904867564040066470770610598552767	43	140.7	2016-11-30 17:48:47

ECM

Digits	B1	Curves
25	50000	18 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Markus Werner	D04444C374DF09BB	0
Verified (Factored)	1999-07-12	Jeff Rennert	D04444C374DF09BB	1383037

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-20	Oliver Kruse	D9EAA2F14B9C84F2	1	2677631	5	3
Verified	2017-12-05	kkmrkkblmbrbk	D9EAA2F14B9C84F2	1	2725565	5	3

P-1 factors

Date	Factor	B1	B2
2016-11-30	2283574827904867564040066470770610598552767	2700000	0

History

Date	User	Type	Result
2022-11-20	USAFSS	NF-PM1	B1=1000000, B2=906922170
2017-12-05	kkmrkkblmbrbk	C-PRP	M2748857/2283574827904867564040066470770610598552767 : D9EAA2F14B9C84F2 PRP: Verified PRP without proof (not generated)
2017-10-20	Oliver Kruse	C-PRP	M2748857/2283574827904867564040066470770610598552767 : D9EAA2F14B9C84F2 PRP: Verified PRP without proof (not generated)
2016-11-30	mikr	F-PM1	Factor: 2283574827904867564040066470770610598552767 / (P-1, B1=2700000)
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2016-02-04	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-06	Grant McCracken	NF	no factor from 2^61 to 2^62
2011-05-04	James Heinrich	NF-PM1	B1=190000, B2=4655000, E=6
2011-01-21	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2010-12-21	Joss	NF-PM1	B1=20000
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61