1 965 781 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
969365926721	12	39.8	old
1800709540749411961567	22	70.6	2021-09-30 01:17:35

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 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	437008369D90B168	1	0	1	3
Verified (Factored)	2017-11-11	ATH	437008369D90B168	1	893408	1	3
Verified	2021-10-01	JackBlock	40E27AA7F5F5EB57	2	1531477	5	3

History

Date	User	Type	Result
2023-10-15	USAFSS	NF-PM1	B1=672000, B2=647447724
2022-08-12	USAFSS	NF-PM1	B1=132000, B2=134381520
2021-10-01	Richard WL Ridley	CERT	PRP Certification Proof certified good
2021-10-01	JackBlock	C-PRP	M1965781/969365926721/1800709540749411961567 : 40E27AA7F5F5EB57 PRP proof power = 7 PRP: Verified Proof certified good
2021-09-30	MarkS	F-ECM	Factor: 1800709540749411961567 / (ECM curve 3, B1=50000, B2=5000000, Sigma=2814880159147500)
2017-11-11	ATH	C-PRP	M1965781/969365926721 : 437008369D90B168 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1965781/969365926721 : 437008369D90B168 PRP: Verified (Factored) PRP without proof (not generated)