9 661 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
6650507470826633	16	52.6	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1281 / 9201

Estimated T-Level: 40.7 ⓘ

TF below 2^130 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	2C5CF188E6796E18	1	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	2C5CF188E6796E18	1	3427	1	3
Unverified	2020-04-17	Oliver Kruse	BACDEF5E0DF1F0__	1	2853	5	3

History

Date	User	Type	Result
2023-06-20	JacobZ	NF-PM1	B1=60000000000, B2=244568457101868900
2022-01-03	Lisander Viaene	NF-PM1	B1=100000000, B2=5133438650340
2020-04-17	Oliver Kruse	C-PRP	M9661/6650507470826633 : BACDEF5E0DF1F0__ PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M9661/6650507470826633 : 2C5CF188E6796E18 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9661/6650507470826633 : 2C5CF188E6796E18 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9661/6650507470826633 : 2C5CF188E6796E18 PRP without proof (not generated)