is 2 1484303 - 1
has 446820 decimal digits
takes 0.057 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L12515CE6A8506ED3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.018868.6567%500000150000000.07144.9421%20.090270.2057%1.5490%
PrimeNet2570.012963.1579%65001000000.00062.3355%0.013664.0183%0.8604%
GPU722610.207065.5738%6000500000.00050.9457%0.207465.8993%0.3256%
Difference+6+19.8118+3.0829%+494000+14950000+0.0710+3.9964%+19.8828+4.3064%+4.3064%

Known prime factors (2 factors, 131.0 bits, 0.00882428% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1484303393577350835153757592065.09313257985425993
33 × 7 × 11 × 1013 × 6295259
2014-01-30101362952595.67040.01900.0355
1484303681711795590348063272065.88622964037517621
19 × 1208633553559
2019-05-101912086335535596.22403,645.66,808.9

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1484303268306322541525044000144111875919562719340130.979
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.964%
2011-01-08T11:07:00Rob_Deetwopc100000200000---0.006--1.221%
2011-01-09T12:55:00Rob_Deetwopc200000300000---0.011--1.525%
2011-01-11T11:19:00Rob_Deetwopc2000001000000---0.013--2.341%
2011-01-12T11:36:00Rob_Deetwopc2000002000000---0.017--2.829%
2011-01-13T09:52:00Rob_Deetwopc2000003000000---0.020--3.121%
2011-01-14T10:27:00Rob_Deetwopc2000004000000---0.023--3.331%
2011-01-15T10:06:00Rob_Deetwopc2000005000000---0.026--3.496%
2016-03-17T19:14:57alpertronManual testing5000001500000012-
skipped known factor: 39357735083515375759
--0.071--4.942%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2010-05-08T10:30:00Architects Cubedm1_f2260261--0.103--
2011-04-05T20:59:00GrunwalderGIMPManual testing21263--1.075--


ECM factoring results:

Old Calculation Method

Total ECM effort:25.596 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000300 / 1003.0004.904%
2550000300 / 2801.07134.186%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:25.596 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2310.000%
25500001.35425.824%
302500000.11389.331%
3510000000.00899.237%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000024311.55
50000500000070.333
250000350000005013.71


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers12515CE6A8506ED30.057


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T06:50:29Oliver KruseGTX-1
39357735083515375759
EA0D8E455CB3A7__no
2017-10-28T16:40:00kkmrkkblmbrbkold
39357735083515375759
EA0D8E455CB3A7__no
2019-05-10T13:58:59ATHec2-PRPCF
39357735083515375759
68171179559034806327
4382F764D6E3ED57no
2019-05-17T00:53:43krackerGRID-11
39357735083515375759
68171179559034806327
4382F764D6E3ED57no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 20000, B2 = 270000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
267
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261
258
257
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Last modified: 2022-01-06T11:55:15+00:00