9 181 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1377151	7	20.4	old
542584545654971527	18	58.9	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	6677 / 16550

Estimated T-Level: 47.0 ⓘ

TF below 2^151 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	27DC446F67717F22	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	27DC446F67717F22	2	8326	1	3
Verified	2020-04-17	Oliver Kruse	E3D3E86F23CC0609	2	4290	5	3
Verified	2024-07-01	kkmrkkblmbrbk	E3D3E86F23CC0609	2	5316	5	3

History

Date	User	Type	Result
2024-07-01	kkmrkkblmbrbk	C-PRP	M9181/1377151/542584545654971527 : E3D3E86F23CC0609 PRP: Verified PRP without proof (small exponent)
2023-07-13	JacobZ	NF-PM1	B1=63000000000, B2=255469764292442700
2021-12-16	Lisander Viaene	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M9181/1377151/542584545654971527 : E3D3E86F23CC0609 PRP: Verified PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M9181/1377151/542584545654971527 : 27DC446F67717F22 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9181/1377151/542584545654971527 : 27DC446F67717F22 PRP: Verified PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M9181/1377151/542584545654971527 : 27DC446F67717F22 PRP without proof (not generated)