1 971 911 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
97309631342503	14	46.5	old
232248033242235529609	21	67.7	2021-07-25 23:07:40
24032175577546738775993	23	74.3	2021-01-28 14:42:29

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	28B82C6C3A2D4B94	1	0	1	3
Verified (Factored)	2017-11-12	ATH	28B82C6C3A2D4B94	1	1275192	1	3
Verified (Factored)	2021-01-28	mrh	67C0993F722EA32B	2	1945657	5	3
Verified	2021-07-26	SRJ2877	67C0993F722EA32B	3	559333	5	3

History

Date	User	Type	Result
2023-12-18	USAFSS	NF-PM1	B1=480000, B2=460965960
2022-08-12	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-07-26	Claude Portenier	CERT	PRP Certification Proof certified good
2021-07-26	SRJ2877	C-PRP	M1971911/97309631342503/232248033242235529609/24032175577546738775993 : 67C0993F722EA32B PRP proof power = 7 PRP: Verified Proof certified good
2021-07-25	MarkS	F-ECM	Factor: 232248033242235529609 / (ECM curve 4, B1=50000, B2=5000000, Sigma=7727602827769523)
2021-01-28	nkl	CERT	PRP Certification Proof certified good
2021-01-28	mrh	C-PRP	M1971911/97309631342503/24032175577546738775993 : 67C0993F722EA32B PRP proof power = 7 PRP: Verified (Factored) Proof certified good
2021-01-28	seatsea	F-ECM	Factor: 24032175577546738775993 / (ECM curve 5, B1=50000, B2=5700000, Sigma=3451417811695708)
2017-11-12	ATH	C-PRP	M1971911/97309631342503 : 28B82C6C3A2D4B94 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1971911/97309631342503 : 28B82C6C3A2D4B94 PRP: Verified (Factored) PRP without proof (not generated)