8 134 589 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
21237971281797244327	20	64.2	2014-01-02 21:19:10

ECM

Digits	B1	Curves
25	50000	3 / 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)	2000-07-25	C. Cooper / S. Boone	DB23DE7BCBC6EC16	3833533
Verified (Factored)	2002-10-19	John Holland	DB23DE7BCBC6EC16	3178482

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2018-08-21	ATH	C9E6AA41C66EDCCF	1	998964	5	3
Verified	2020-02-17	Luigi Morelli	C9E6AA41C66EDCCF	1	1086267	5	3

History

Date	User	Type	Result
2023-05-14	Flaukrotist	NF	no factor from 2^68 to 2^69
2023-02-16	Flaukrotist	NF-PM1	B1=2200000, B2=1854694050
2022-06-22	LordJulius	NF	no factor from 2^66 to 2^67
2022-06-22	LordJulius	NF	no factor from 2^65 to 2^66
2022-04-23	Flaukrotist	NF	no factor from 2^67 to 2^68
2020-02-17	Luigi Morelli	C-PRP	M8134589/21237971281797244327 : C9E6AA41C66EDCCF PRP: Verified PRP without proof (not generated)
2018-08-21	ATH	C-PRP	M8134589/21237971281797244327 : C9E6AA41C66EDCCF PRP: Verified PRP without proof (not generated)
2014-01-02	David Campeau	F	Factor: 21237971281797244327 / TF: 64-65
2013-09-20	Axelsson	NF	no factor from 2^63 to 2^64
2012-09-23	James Heinrich	NF-PM1	B1=215000, B2=5375000, E=6