1 816 489 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
43595737	8	25.4	old
508616921	9	28.9	2008-07-15 07:46:58
2164991359218315753582481	25	80.8	2020-06-01 02:18:17

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)	2017-10-03	Oliver Kruse	DBA6A2D156C00A15	2	0	1	3
Verified (Factored)	2017-11-05	kkmrkkblmbrbk	DBA6A2D156C00A15	2	838665	1	3
Verified	2020-06-01	M Miller	C54BDCADD1095519	3	1695669	5	3
Verified	2020-06-02	Luigi Morelli	C54BDCADD1095519	3	269278	5	3

History

Date	User	Type	Result
2020-06-02	Luigi Morelli	C-PRP	M1816489/43595737/508616921/2164991359218315753582481 : C54BDCADD1095519 PRP: Verified PRP without proof (not generated)
2020-06-01	M Miller	C-PRP	M1816489/43595737/508616921/2164991359218315753582481 : C54BDCADD1095519 PRP: Verified PRP without proof (not generated)
2020-06-01	nordi	F-ECM	Factor: 2164991359218315753582481 / (ECM curve 39, B1=50000, B2=5000000, Sigma=2270902000241974)
2017-11-05	kkmrkkblmbrbk	C-PRP	M1816489/43595737/508616921 : DBA6A2D156C00A15 PRP: Verified PRP without proof (not generated)
2017-10-03	Oliver Kruse	C-PRP	M1816489/43595737/508616921 : DBA6A2D156C00A15 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2008-07-15	J Feitsma	F	Factor: 508616921