1 974 403 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
19744031	8	24.2	old
21323552401	11	34.3	2008-07-15 07:48:52
320415333675150992689	21	68.1	2021-08-19 08:31:32

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	58 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	9B77041B46E5799F	2	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	9B77041B46E5799F	2	1946524	1	3
Verified	2021-08-19	/r/counting	A4495DBD9771101B	3	481185	5	3

History

Date	User	Type	Result
2022-08-12	USAFSS	NF-PM1	B1=192000, B2=211179150
2021-08-21	curtisc	CERT	PRP Certification Proof certified good
2021-08-19	/r/counting	C-PRP	M1974403/19744031/21323552401/320415333675150992689 : A4495DBD9771101B PRP proof power = 7 PRP: Verified Proof certified good
2021-08-19	_p95holder_	F-ECM	Factor: 320415333675150992689 / (ECM curve 3, B1=50000, B2=5000000)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1974403/19744031/21323552401 : 9B77041B46E5799F PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1974403/19744031/21323552401 : 9B77041B46E5799F PRP: Verified (Factored) PRP without proof (not generated)
2008-07-15	J Feitsma	F	Factor: 21323552401