1 971 023 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
3942047	7	21.9	old
859823305337	12	39.6	2008-07-15 07:48:49
253802273835639222319	21	67.8	2021-01-26 12:12:50

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 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)	2017-10-05	Oliver Kruse	431A074D75DB28A3	2	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	431A074D75DB28A3	2	300777	1	3
Verified	2021-01-26	SRJ2877	89EA1A9E6A6469D6	3	1411872	5	3

History

Date	User	Type	Result
2023-12-17	USAFSS	NF-PM1	B1=480000, B2=460965960
2022-08-12	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-01-26	ANONYMOUS	CERT	PRP Certification Proof certified good
2021-01-26	SRJ2877	C-PRP	M1971023/3942047/859823305337/253802273835639222319 : 89EA1A9E6A6469D6 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-26	seatsea	F-ECM	Factor: 253802273835639222319 / (ECM curve 5, B1=50000, B2=6300000, Sigma=5144894689097519)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1971023/3942047/859823305337 : 431A074D75DB28A3 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1971023/3942047/859823305337 : 431A074D75DB28A3 PRP: Verified (Factored) PRP without proof (not generated)
2008-07-15	J Feitsma	F	Factor: 859823305337