23 767 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
616614908990626200765057718466186917641239	42	138.8	2017-12-27 09:25:13

ECM

Estimated T-Level: 43.5 ⓘ

TF below 2^140 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Unknown	7AFD	0
Verified (Factored)		George Woltman	1F8CB0D5228FFAFD	0
Verified (Factored)		Brian J. Beesley	1F8CB0D5228FFAFD	0
Verified (Factored)	2015-04-11	MadPoo	1F8CB0D5228FFAFD	22434

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-12-29	Oliver Kruse	E1B4F27572FC6329	1	19491	5	3
Verified	2017-12-29	ATH	E1B4F27572FC6329	1	9081	5	3

History

Date	User	Type	Result
2024-11-23	masser	NF-PP1	Start=2/7, B1=100000000, B2=99900000000
2024-11-16	masser	NF-PP1	Start=74/59, B1=100000000, B2=99900000000
2024-11-12	masser	NF-PP1	Start=6/5, B1=100000000, B2=99900000000
2024-02-21	nordi	NF-PM1	B1=8000000000, B2=2427250412837250
2023-04-11	nordi	NF-PM1	B1=8000000000
2017-12-29	ATH	C-PRP	M23767/616614908990626200765057718466186917641239 : E1B4F27572FC6329 PRP: Verified PRP without proof (small exponent)
2017-12-29	Oliver Kruse	C-PRP	M23767/616614908990626200765057718466186917641239 : E1B4F27572FC6329 PRP: Verified PRP without proof (small exponent)
2017-12-27	volki	F-ECM	Factor: 616614908990626200765057718466186917641239 / (ECM curve 75, B1=11000000, B2=1100000000)
2017-02-07	mikr	NF-PM1	B1=12000000000, B2=960000000000, E=12
2016-12-18	kkmrkkblmbrbk	NF-PM1	B1=1000000000
2016-09-22	Sid & Andy	NF	no factor from 2^62 to 2^63
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-04-11	MadPoo	C-LL	1F8CB0D5228FFAFD
2013-11-18	David Campeau	NF-PM1	B1=761580000
2013-11-14	David Campeau	NF-PM1	B1=609265000
2013-10-30	David Campeau	NF-PM1	B1=456950000
2013-10-23	David Campeau	NF-PM1	B1=304635000
2012-04-02	bcp19	NF	no factor from 2^61 to 2^62
2012-04-02	bcp19	NF	no factor from 2^60 to 2^61
2009-01-28	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-19	Sturle Sunde	NF	no factor from 2^58 to 2^59

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