is 2 2480069 - 1
has 746576 decimal digits
takes 0.172 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L0C924097B42B8975double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26824.033667.6471%2382500857701000.69657.5478%24.730170.0890%2.4419%
PrimeNet2590.031062.7119%100001800000.00192.5341%0.032963.6568%0.9449%
GPU722630.643565.0794%110001600000.00191.3798%0.645565.5612%0.4818%
Difference+5+23.3900+2.5677%+2371500+85610100+0.6946+6.1680%+24.0846+4.5278%+4.5278%

Known prime factors (1 factor, 78.0 bits, 0.00314571% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24800693055614107665274946450412478.01661603409172593080
23 × 5 × 13 × 149 × 6397 × 124290743
2021-04-14639712429074325,2180.68171.2720

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-06-23T00:00:00ANONYMOUSv4_computers1000001000000---0.015--2.025%
2014-09-23T20:52:00Jocelyn LaroucheManual testing125880125880---0.013--0.938%
2014-10-30T08:32:00mikrMSI238250085770100---0.697--7.548%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00ANONYMOUSv4_computers21259--0.031--
2000-10-15T00:00:00ANONYMOUSv4_computers21259--0.031--
2016-02-23T16:29:15Mark RoseManual testing259260--0.031--
2009-01-14T21:48:00Sturle Sundescarpia.ifi260261--0.062--
2012-06-24T13:01:00Sebastian HornbostelManual testing261262--0.124--
2013-01-23T08:29:00dbaughManual testing262263--0.396--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.792--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.507--
2015-10-29T11:36:21ramgeisManual testing265266--3.013--
2017-07-22T20:28:36Gordon SpenceManual testing266267--6.026--
2019-07-24T10:13:48TJAOIManual testing267268--12.05--


ECM factoring results:

Old Calculation Method

Total ECM effort:10.652 GHz-days
Estimated T-Level:22.071
DigitsB1CurvesCompleteFacMiss
2011000116 / 1001.16031.166%
2550000116 / 2800.41466.032%

New Calculation Method

Total ECM effort:10.652 GHz-days
Estimated T-Level:22.071
DigitsB1CompleteFacMiss
20110004.4621.154%
25500000.41366.179%
302500000.02697.430%
3510000000.00199.878%


ECM Summary

B1B2factorcurvesGHz-days
50000500000011110.19
50000500000050.459


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-02T00:00:00ANONYMOUSv4_computers0C924097B42B89750.172
2000-10-15T00:00:00ANONYMOUSv4_computers0C924097B42B89750.172


PRP results:
dateuseridcompidcofactorsres64PRP
2021-04-15T09:17:23Yuji Hasegawavj22m
305561410766527494645041
321DF82B5E0673E3no
2021-04-15T19:34:46oodairacom2
305561410766527494645041
321DF82B5E0673E3no


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 100000, B2 = 1000000 (P-1 stage 2)
B1 = 125880 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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102
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109
TF factor-bounds graph:
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266
265
264
263
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261
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2100
Last modified: 2021-04-15T19:34:46+00:00