is 2 1330393 - 1
has 400489 decimal digits
takes 0.051 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LF444E99BFCFF4EA3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26722.334768.6567%500000150000000.07144.8770%22.406170.1853%1.5286%
PrimeNet2560.007262.5000%60001000000.00062.6055%0.007863.4770%0.9770%
GPU722600.115465.0000%5500400000.00040.9784%0.115965.3424%0.3424%
Difference+7+22.2192+3.6567%+494500+14960000+0.0710+3.8986%+22.2903+4.8429%+4.8429%

Known prime factors (2 factors, 146.6 bits, 0.01102000% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1330393102852993644574142113532373.1233865511681306732
22 × 5851 × 270059 × 611587
2009-08-092700596115872,418.80.01600.0304
1330393132301075094049806476392373.4864972255382208483
32 × 552472820245387
2018-09-1495524728202453872,559.21,666,4043,112,378

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
133039313607561635818631066612359705482602036644556745146.609
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers15000213750---0.001--0.791%
2016-03-17T19:05:05alpertronManual testing5000001500000012-
skipped known factor: 10285299364457414211353
--0.071--4.877%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-11-03T00:00:00ANONYMOUSv4_computers21257--0.014--
2003-06-23T00:00:00ANONYMOUSv4_computers21258--0.029--
2022-03-07T17:32:33LordJuliusManual testing258260--0.087--
2009-02-15T18:18:00Sturle Sundescarpia.ifi260261--0.115--


ECM factoring results:

Old Calculation Method

Total ECM effort:24.999 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000298 / 1002.9805.004%
2550000298 / 2801.06434.432%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:24.999 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.5380.000%
25500001.64019.395%
302500000.14086.925%
3510000000.01099.024%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000001808.397
500005000000683.172
250000350000005013.43


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-03-17T00:00:00Bruce A Metcalfv4_computersF444E99BFCFF4EA30.051


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T04:28:34Oliver KruseGTX-1
10285299364457414211353
DEFDBDED5B679F__no
2017-10-23T19:04:48kkmrkkblmbrbkc4.xlarge
10285299364457414211353
DEFDBDED5B679F__no
2018-09-14T19:25:25Oliver KruseGTX-7
10285299364457414211353
13230107509404980647639
B5F3B0BE20F4CD__no
2018-09-14T19:32:05ANONYMOUS
10285299364457414211353
13230107509404980647639
B5F3B0BE20F4CD__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 15000, B2 = 213750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-07T17:32:33+00:00