4 920 263 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
28485616625351	14	44.7	old
85364623838129298583	20	66.2	2019-08-08 08:37:32

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-20	kkmrkkblmbrbk	F0D9621ACD2EE572	1	0	1	3
Verified (Factored)	2018-04-14	Oliver Kruse	F0D9621ACD2EE572	1	2311536	1	3
Verified	2019-08-08	Niels_Mache_Nextcloud	9CCBB12B086E041C	2	1056698	5	3
Verified	2019-08-08	ATH	9CCBB12B086E041C	2	3347168	5	3

History

Date	User	Type	Result
2023-09-15	USAFSS	NF-PM1	B1=256000, B2=105522060
2019-08-08	ATH	C-PRP	M4920263/28485616625351/85364623838129298583 : 9CCBB12B086E041C PRP: Verified PRP without proof (not generated)
2019-08-08	Niels_Mache_Nextcloud	C-PRP	M4920263/28485616625351/85364623838129298583 : 9CCBB12B086E041C PRP: Verified PRP without proof (not generated)
2019-08-08	MarkS	F-ECM	Factor: 85364623838129298583 / (ECM curve 1, B1=50000, B2=5000000)
2018-04-14	Oliver Kruse	C-PRP	M4920263/28485616625351 : F0D9621ACD2EE572 PRP: Verified PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4920263/28485616625351 : F0D9621ACD2EE572 PRP: Verified PRP without proof (not generated)