3 745 891 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
80049409619731455551	20	66.1	2015-11-15 01:56:17

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)	1998-01-21	Joel Armengaud	F4AE37F1DCA9F842	0
Verified (Factored)	1999-08-31	Pete Isensee	F4AE37F1DCA9F842	3403317

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-20	kkmrkkblmbrbk	FCC31FF84C5A7BC4	1	0	1	3
Verified	2017-12-04	Oliver Kruse	FCC31FF84C5A7BC4	1	3547832	1	3

P-1 factors

Date	Factor	B1	B2
2015-11-15	80049409619731455551	1600000	66000000

History

Date	User	Type	Result
2022-05-26	Joss	NF-PM1	B1=200000, B2=130364850
2017-12-04	Oliver Kruse	C-PRP	M3745891/80049409619731455551 : FCC31FF84C5A7BC4 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M3745891/80049409619731455551 : FCC31FF84C5A7BC4 PRP: Verified PRP without proof (not generated)
2015-11-15	mikr	F-PM1	Factor: 80049409619731455551 / (P-1, B1=1600000, B2=66000000, E=12)
2015-01-23	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-01-23	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-03-14	Squeeky_Squirrel	NF-PM1	B1=110000, B2=2035000, E=6
2012-05-10	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-05-06	markr	NF	no factor to 2^62
2009-07-07	Carsten Kossendey	NF-PM1	B1=20000, B2=265000
2009-03-05	S485122	NF	no factor from 2^60 to 2^61