4 211 899 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
75814183	8	26.2	old
42354291339987976721	20	65.2	2018-07-24 11:18:23

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-11-16	Oliver Kruse	1308BFDA5DEB58B8	1	3201684	5	3
Verified (Factored)	2017-12-28	kkmrkkblmbrbk	1308BFDA5DEB58B8	1	2653583	5	3
Verified	2018-07-27	_p95holder_	1308BFDA5DEB58B8	2	1372909	5	3

History

Date	User	Type	Result
2022-10-01	USAFSS	NF-PM1	B1=200000, B2=135233670
2018-07-27	_p95holder_	C-PRP	M4211899/75814183/42354291339987976721 : 1308BFDA5DEB58B8 PRP: Verified PRP without proof (not generated)
2018-07-24	TJAOI	F	Factor: 42354291339987976721 / TF: 65-66
2017-12-28	kkmrkkblmbrbk	C-PRP	M4211899/75814183 : 1308BFDA5DEB58B8 PRP: Verified PRP without proof (not generated)
2017-11-16	Oliver Kruse	C-PRP	M4211899/75814183 : 1308BFDA5DEB58B8 PRP: Verified PRP without proof (not generated)