4 900 289 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
37585216631	11	35.1	old
298284244502458628214968425487	30	97.9	2021-09-24 03:17:25
1257909928999888542965214609127	31	100.0	2021-09-24 03:17:25

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)	2017-09-20	kkmrkkblmbrbk	104284563E1470A2	1	0	1	3
Verified (Factored)	2018-04-05	trebor	104284563E1470A2	1	1584274	1	3
Verified	2021-09-24	mikr	F7846AC45D428987	3	3649072	5	3

P-1 factors

Date	Factor	B1	B2
2021-09-24	375214712823873127465912884273993479895231432491081329619849	2350000	213850000

History

Date	User	Type	Result
2021-09-24	khyu	CERT	PRP Certification Proof certified good
2021-09-24	mikr	C-PRP	M4900289/37585216631/298284244502458628214968425487/1257909928999888542965214609127 : F7846AC45D428987 PRP proof power = 7 PRP: Verified Proof certified good
2021-09-24	Dylan Delgado	F-PM1	Factor: 375214712823873127465912884273993479895231432491081329619849 / (P-1, B1=2350000, B2=213850000)
2018-04-05	trebor	C-PRP	M4900289/37585216631 : 104284563E1470A2 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-20	kkmrkkblmbrbk	C-PRP	M4900289/37585216631 : 104284563E1470A2 PRP: Verified (Factored) PRP without proof (not generated)