8 121 011 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
2387539486643439473849887297	28	90.9	2021-11-25 12:36:42

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)	1999-09-30	Marc Getty / Phil Fizur	82161D610825D2F4	0
Verified (Factored)	2002-12-02	chris clark	82161D610825D2F4	7700766

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-12-05	RichD0	A0AE617B5393049C	1	1885481	5	3

P-1 factors

Date	Factor	B1	B2
2021-11-25	2387539486643439473849887297	5000000	5000000

History

Date	User	Type	Result
2022-10-17	Flaukrotist	NF-PM1	B1=6500000, B2=5757565440
2021-12-05	ZeroOf149	CERT	PRP Certification Proof certified good
2021-12-05	RichD0	C-PRP	M8121011/2387539486643439473849887297 : A0AE617B5393049C PRP proof power = 8 PRP: Verified Proof certified good
2021-11-25	Flaukrotist	F-PM1	Factor: 2387539486643439473849887297 / (P-1, B1=5000000)
2021-09-30	SRBase	NF	no factor from 2^71 to 2^72
2021-08-27	SRBase	NF	no factor from 2^70 to 2^71
2021-08-20	SRBase	NF	no factor from 2^69 to 2^70
2019-12-02	mnd9	NF	no factor from 2^68 to 2^69
2018-07-03	chuenkit	NF	no factor from 2^67 to 2^68
2015-11-30	snme2pm1	NF	no factor from 2^66 to 2^67
2015-05-25	snme2pm1	NF	no factor from 2^65 to 2^66
2013-12-26	David Campeau	NF	no factor from 2^64 to 2^65
2013-09-15	Axelsson	NF	no factor from 2^63 to 2^64
2012-10-17	Nesowa	NF-PM1	B1=100000, B2=1975000, E=6