1 408 409 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
72861983296666459213481	23	75.9	2009-02-22 02:50:36
129996666319926295419281	24	76.8	2019-01-11 18:46:00

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	Shift
Verified (Factored)		Michael J. Kilfoyle	A8BDF95A08AC377A	0
Verified (Factored)		Simon Burge	A8BDF95A08AC377A	0

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	Oliver Kruse	F4CE6E8977376FC4	1	0	1	3
Verified (Factored)	2017-10-26	kkmrkkblmbrbk	F4CE6E8977376FC4	1	195972	1	3
Verified	2019-01-12	Oliver Kruse	10AC8847085E8044	2	543391	5	3
Verified	2019-01-12	marssystems	10AC8847085E8044	2	905540	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2019-01-12	marssystems	C-PRP	M1408409/72861983296666459213481/129996666319926295419281 : 10AC8847085E8044 PRP: Verified PRP without proof (not generated)
2019-01-12	Oliver Kruse	C-PRP	M1408409/72861983296666459213481/129996666319926295419281 : 10AC8847085E8044 PRP: Verified PRP without proof (not generated)
2019-01-11	TJAOI	F-ECM	Factor: 129996666319926295419281 / (ECM curve 81, B1=50000, B2=5000000)
2017-10-26	kkmrkkblmbrbk	C-PRP	M1408409/72861983296666459213481 : F4CE6E8977376FC4 PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1408409/72861983296666459213481 : F4CE6E8977376FC4 PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-02-22	Aca Arsov	F-ECM	Factor: 72861983296666459213481
2009-02-19	Sturle Sunde	NF	no factor from 2^60 to 2^61