2 115 431 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
18863268192110663	17	54.1	old
643504270890730897513	21	69.1	2023-02-11 23:24:28

ECM

Digits	B1	Curves
25	50000	82 / 280

Estimated T-Level: 21.5 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-07	Oliver Kruse	955B1F7FE0406170	1	0	1	3
Verified (Factored)	2017-11-17	ATH	955B1F7FE0406170	1	1237720	1	3
Verified	2023-02-12	LordJulius	461EA1A5F0A5D556	2	1220325	5	3

History

Date	User	Type	Result
2023-02-13	curtisc	CERT	PRP Certification Proof certified good
2023-02-12	LordJulius	C-PRP	M2115431/18863268192110663/643504270890730897513 : 461EA1A5F0A5D556 PRP proof power = 7 PRP: Verified Proof certified good
2023-02-11	_p95holder_	F-ECM	Factor: 643504270890730897513 / (ECM curve 38, B1=50000, B2=5000000)
2017-11-17	ATH	C-PRP	M2115431/18863268192110663 : 955B1F7FE0406170 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-07	Oliver Kruse	C-PRP	M2115431/18863268192110663 : 955B1F7FE0406170 PRP: Verified (Factored) PRP without proof (not generated)
2016-03-24	alpertron	NF-PM1	B1=500000, B2=15000000, E=12