6 277 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

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

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Assignments

Assigned	User	Work Type	Stage	% Done	Updated	Est Complete	Expired
2026-02-22	Graham Barnes	ECM			2026-02-23	2026-02-24

Factored

Factor	Digits	Bits	Date
37663	5	15.2	old
1163404289	10	30.1	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	3161 / 16550

Estimated T-Level: 46.0 ⓘ

TF below 2^148 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-21	Oliver Kruse	E232A6E76AC46A7C	2	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	E232A6E76AC46A7C	2	3395	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	E841D4363B0491F8	2	1719	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	E841D4363B0491F8	2	1554	5	3

History

Date	User	Type	Result
2025-03-19	masser	NF-PP1	Start=184/47, B1=1000000000, B2=999000000000
2025-03-10	masser	NF-PP1	Start=6/5, B1=1000000000, B2=999000000000
2025-03-01	masser	NF-PP1	Start=2/7, B1=1000000000, B2=999000000000
2024-02-03	Wentao Huang	C-PRP	M6277/37663/1163404289 : E841D4363B0491F8
2023-08-02	-anonymous-	NF-PM1	B1=39000000000, B2=163113042636343800
2021-08-01	ViliamF	NF-PM1	B1=500000000, B2=90500000000
2020-04-17	Oliver Kruse	C-PRP	M6277/37663/1163404289 : E841D4363B0491F8
2017-10-12	kkmrkkblmbrbk	C-PRP	M6277/37663/1163404289 : E232A6E76AC46A7C
2017-09-21	Oliver Kruse	C-PRP	M6277/37663/1163404289 : E232A6E76AC46A7C
2017-09-21	Oliver Kruse	C-PRP	M6277/37663/1163404289 : E232A6E76AC46A7C