12 511 663 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
154601288809110507697	21	67.1	2017-01-22 15:31:37

ECM

Digits	B1	Curves
25	50000	1 / 280

Estimated T-Level: 20.0 ⓘ

TF below 2^61 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	2001-08-31	Jeffrey Kirk	BB471DAC33091678	12251188
Verified (Factored)	2004-08-06	John Krug	BB471DAC33091678	11943062

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-04-14	Klaus Nordmann	ADB49651B940D1E9	1	5593155	5	3

History

Date	User	Type	Result
2023-10-24	nordi	NF-PM1	B1=500000, B2=430944150
2023-10-17	nordi	NF-PM1	B1=500000
2022-04-14	iwes	CERT	PRP Certification Proof certified good
2022-04-14	Klaus Nordmann	C-PRP	M12511663/154601288809110507697 : ADB49651B940D1E9 PRP proof power = 8 PRP: Verified Proof certified good
2017-01-22	Conductor	F	Factor: 154601288809110507697 / TF: 67-68
2015-03-21	Tha	NF	no factor from 2^66 to 2^67
2015-02-14	Tha	NF-PM1	B1=300000, B2=6000000, E=12
2014-03-28	Nesowa	NF	no factor from 2^65 to 2^66
2013-06-20	lycorn	NF	no factor from 2^64 to 2^65