6 983 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 3 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
13967	5	13.8	old
13630817	8	23.7	old
65543720358121	14	45.9	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	7263 / 16550

Estimated T-Level: 47.2 ⓘ

TF below 2^152 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	28C2B2D9DE7017BF	3	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	28C2B2D9DE7017BF	3	5161	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	9A9FC2530507F5D3	3	1331	5	3
Factored	No proof (small exponent)	2022-05-12	Jorge Coveiro	9A9FC2530507F5D3	1	3955	5	3
Verified	No proof (small exponent)	2024-02-03	Wentao Huang	9A9FC2530507F5D3	3	5142	5	3

History

Date	User	Type	Result
2025-03-24	masser	NF-PP1	Start=163/43, B1=1000000000, B2=999000000000
2025-03-16	masser	NF-PP1	Start=6/5, B1=1000000000, B2=999000000000
2025-03-07	masser	NF-PP1	Start=2/7, B1=1000000000, B2=999000000000
2024-02-03	Wentao Huang	C-PRP	M6983/13967/13630817/65543720358121 : 9A9FC2530507F5D3
2023-08-20	-anonymous-	NF-PM1	B1=35000000000, B2=143589103727719650
2022-05-12	Jorge Coveiro	C-PRP	M6983/13967 : 9A9FC2530507F5D3
2021-12-16	ANONYMOUS	NF-PM1	B1=100000000
2020-04-17	Oliver Kruse	C-PRP	M6983/13967/13630817/65543720358121 : 9A9FC2530507F5D3
2017-10-12	kkmrkkblmbrbk	C-PRP	M6983/13967/13630817/65543720358121 : 28C2B2D9DE7017BF
2017-09-21	Oliver Kruse	C-PRP	M6983/13967/13630817/65543720358121 : 28C2B2D9DE7017BF
2017-09-21	Oliver Kruse	C-PRP	M6983/13967/13630817/65543720358121 : 28C2B2D9DE7017BF