is 2 2340551 - 1
has 704577 decimal digits
takes 0.158 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L838D013468FA22E5double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.695367.1642%50000005050000003.158210.9869%15.853570.7718%3.6076%
PrimeNet2580.016462.0690%110002000000.00213.0464%0.018563.2245%1.1555%
GPU722620.262564.5161%130002000000.00231.7850%0.264865.1495%0.6334%
Difference+5+12.4328+2.6481%+4987000+504800000+3.1560+9.2019%+15.5887+5.6223%+5.6223%

Known prime factors (1 factor, 75.3 bits, 0.00321525% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2340551450705216285835044737592375.2559628186189615929
32 × 13 × 1087 × 2011 × 37645841
2016-05-062011376458414,422.00.20110.3752

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.285%
2010-03-01T08:42:00Budannan50000010000000---0.100--4.830%
2018-03-18T01:19:46alpertronManual testing5000001500000012---0.126--5.221%
2021-04-18T21:58:44ViliamF35000000505000000-
skipped known factor: 45070521628583504473759
--3.158--10.987%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:12Mark RoseManual testing21260--0.066--
2009-01-11T16:42:00Sturle Sundegobi.ifi260261--0.066--
2012-05-28T16:42:00Sebastian HornbostelManual testing261262--0.131--
2013-12-04T08:58:00Luigi MorelliManual testing262263--0.419--
2015-03-06T11:15:00VictordeHollanderManual testing263264--0.839--
2015-03-06T11:15:00VictordeHollanderManual testing264265--1.596--
2015-10-25T20:35:19ramgeisManual testing265266--3.193--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.774 GHz-days
Estimated T-Level:1.000
DigitsB1CurvesCompleteFacMiss
201100020 / 1000.20081.791%
255000020 / 2800.07193.094%

New Calculation Method

Total ECM effort:1.774 GHz-days
Estimated T-Level:1.000
DigitsB1CompleteFacMiss
20110000.76946.337%
25500000.07193.130%
302500000.00499.552%


ECM Summary

B1B2factorcurvesGHz-days
500005000000181.597
50000500000020.177


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2015-11-15T02:52:15MadPooManual testing838D013468FA22E50.158


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-12T02:47:19Oliver KruseGTX-0
45070521628583504473759
096A1089C62436__no
2017-11-24T05:11:00kkmrkkblmbrbkc4.xlarge
45070521628583504473759
096A1089C62436__no


P-1 factor-bounds graph:
B1 = 5000000, B2 = 505000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000, B2 = 10000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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2100
Last modified: 2021-04-18T21:58:44+00:00