is 2 2360609 - 1
has 710615 decimal digits
takes 0.159 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA250D086C21B39DEdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26825.249867.6471%30000001000000000.81157.8339%26.061370.1816%2.5345%
PrimeNet2590.032562.7119%100001700000.00182.4719%0.034463.6336%0.9217%
GPU722630.676165.0794%100001400000.00171.2705%0.677865.5230%0.4437%
Difference+5+24.5737+2.5677%+2990000+99860000+0.8099+6.5635%+25.3836+4.6585%+4.6585%

Known prime factors (1 factor, 77.9 bits, 0.00330140% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23606092885563681101289318477512477.93361119051928999875
32 × 53 × 54328046159111
2020-07-121255432804615911113,513289,943541,532

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.231%
2010-11-03T21:25:00Jocelyn LaroucheManual testing2000020000---0.002--0.260%
2010-12-23T16:41:00Oscar Östlin7501175011---0.007--0.682%
2011-01-22T19:26:00Oscar Östlin900001822500---0.018--2.297%
2014-08-07T10:52:00Jocelyn LaroucheManual testing117190117190---0.011--0.893%
2014-10-22T23:53:00Jocelyn LaroucheManual testing144380144380---0.014--1.004%
2015-08-21T17:40:00mikrMSI3000000100000000---0.812--7.834%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.033--
2016-02-23T16:29:12Mark RoseManual testing259260--0.033--
2009-01-10T22:17:00Sturle Sundeghini.ifi260261--0.065--
2012-05-30T11:43:00Sebastian HornbostelManual testing261262--0.130--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.416--
2015-03-09T12:35:00VictordeHollanderManual testing263264--0.832--
2015-03-09T12:35:00VictordeHollanderManual testing264265--1.583--
2015-10-29T11:36:25ramgeisManual testing265266--3.166--
2017-06-13T16:34:54Gordon SpenceManual testing266267--6.331--
2019-04-22T13:11:35TJAOIManual testing267268--12.66--


ECM factoring results:

Old Calculation Method

Total ECM effort:5.950 GHz-days
Estimated T-Level:3.350
DigitsB1CurvesCompleteFacMiss
201100067 / 1000.67050.999%
255000067 / 2800.23978.685%

New Calculation Method

Total ECM effort:5.950 GHz-days
Estimated T-Level:3.350
DigitsB1CompleteFacMiss
20110002.16111.518%
25500000.19582.256%
302500000.01298.804%


ECM Summary

B1B2factorcurvesGHz-days
500005000000665.861
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00ANONYMOUSv4_computersA250D086C21B39DE0.159
2018-05-11T01:29:01kkmrkkblmbrbkoldA250D086C21B39DE0.159


PRP results:
dateuseridcompidcofactorsres64PRP
2020-07-12T10:17:27CrypticClueManual testing
288556368110128931847751
BCE0CA643BF52E98no
2020-07-13T00:59:46pew10980xe_1
288556368110128931847751
BCE0CA643BF52E98no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 90000, B2 = 1822500 (P-1 stage 2)
B1 = 144380 (P-1 stage 1)
B1 = 117190 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 20000 (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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Last modified: 2020-07-13T00:59:46+00:00