234 781 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
397958517393165506082454535401	30	98.3	2019-04-28 15:14:23

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	533 / 640

Estimated T-Level: 29.2 ⓘ

TF below 2^92 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Unknown	5A39	0
Verified (Factored)		Luke Welsh	84E5889463C0DA39	0
Verified (Factored)		Brian J. Beesley	84E5889463C0DA39	0
Verified (Factored)		Eivind Triel	84E5889463C0DA39	8545
Verified (Factored)	2016-06-01	MadPoo	84E5889463C0DA39	117122

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-28	ATH	D5951BF3B307EAF2	1	112711	5	3
Verified	2019-04-29	marssystems	D5951BF3B307EAF2	1	130559	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-04-29	marssystems	C-PRP	M234781/397958517393165506082454535401 : D5951BF3B307EAF2 PRP: Verified PRP without proof (small exponent)
2019-04-28	ATH	C-PRP	M234781/397958517393165506082454535401 : D5951BF3B307EAF2 PRP: Verified PRP without proof (small exponent)
2019-04-28	lycorn	F-ECM	Factor: 397958517393165506082454535401 / (ECM curve 79, B1=250000, B2=25000000)
2018-03-07	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	84E5889463C0DA39
2016-03-18	Joss	NF-PM1	B1=800100000, B2=1600200000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2016-01-12	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-12	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-07-17	snme2pm1	NF	no factor from 2^61 to 2^62
2015-02-20	Joss	NF-PM1	B1=800100000
2015-02-02	Joss	NF-PM1	B1=800000000
2010-12-20	Joss	NF-PM1	B1=790300000
2010-12-11	Joss	NF-PM1	B1=500000000
2010-12-11	Joss	NF-PM1	B1=400000000
2010-12-07	Joss	NF-PM1	B1=300000000
2010-12-04	Joss	NF-PM1	B1=200000000
2010-12-04	Joss	NF	no factor from 2^60 to 2^61
2010-11-29	Joss	NF-PM1	B1=100000000
2010-11-23	Joss	NF-PM1	B1=10000000
2010-11-23	Joss	NF-PM1	B1=2000000
2009-01-26	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-01	Sturle Sunde	NF	no factor from 2^58 to 2^59

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