4 908 181 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
1374290681	10	30.4	old
4489807651561	13	42.0	2013-12-16 13:30:42
16423407267204919192639	23	73.8	2019-08-01 16:06:59

ECM

Digits	B1	Curves
25	50000	2 / 280

Estimated T-Level: 20.0 ⓘ

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)	2017-09-20	kkmrkkblmbrbk	DC8FD509CEFC203F	2	0	1	3
Verified (Factored)	2018-04-08	Oliver Kruse	DC8FD509CEFC203F	2	3947251	1	3
Verified	2019-08-02	trebor	FB75507C7B1EAC47	3	2725671	5	3
Verified	2019-08-04	arnaud	FB75507C7B1EAC47	3	725546	5	3

History

Date	User	Type	Result
2022-10-04	USAFSS	NF-PM1	B1=260000, B2=167750730
2019-08-04	arnaud	C-PRP	M4908181/1374290681/4489807651561/16423407267204919192639 : FB75507C7B1EAC47 PRP: Verified PRP without proof (not generated)
2019-08-02	trebor	C-PRP	M4908181/1374290681/4489807651561/16423407267204919192639 : FB75507C7B1EAC47 PRP: Verified PRP without proof (not generated)
2019-08-01	ATH	F-ECM	Factor: 16423407267204919192639 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7908371053527411)
2018-04-08	Oliver Kruse	C-PRP	M4908181/1374290681/4489807651561 : DC8FD509CEFC203F PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4908181/1374290681/4489807651561 : DC8FD509CEFC203F PRP: Verified PRP without proof (not generated)
2013-12-16	TJAOI	F	Factor: 4489807651561