1 901 839 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
304294241	9	28.2	old
2620488368867501201	19	61.2	2016-04-07 11:48:39
6240910991184829939633	22	72.4	2021-04-03 17:47:50

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-04	Oliver Kruse	400275BA02154152	2	0	1	3
Verified (Factored)	2017-11-09	ATH	400275BA02154152	2	791485	1	3
Verified	2021-04-05	daveward2005	840516328A7BAE32	3	236438	5	3

History

Date	User	Type	Result
2021-06-29	Dylan Delgado	NF-PM1	B1=2000000, B2=262000000
2021-04-06	Dylan Delgado	NF-PM1	B1=1000000, B2=71000000
2021-04-05	Staffan Soderhjelm	CERT	PRP Certification Proof certified good
2021-04-05	daveward2005	C-PRP	M1901839/304294241/2620488368867501201/6240910991184829939633 : 840516328A7BAE32 PRP proof power = 7 PRP: Verified Proof certified good
2021-04-03	MarkS	F-ECM	Factor: 6240910991184829939633 / (ECM curve 5, B1=50000, B2=5000000, Sigma=2658157696945284)
2017-11-09	ATH	C-PRP	M1901839/304294241/2620488368867501201 : 400275BA02154152 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1901839/304294241/2620488368867501201 : 400275BA02154152 PRP: Verified (Factored) PRP without proof (not generated)
2016-04-07	TJAOI	F	Factor: 2620488368867501201 / TF: 61-62
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12