is 2 1754713 - 1
has 528222 decimal digits
takes 0.095 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LC6E02284A1B39E88double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26716.933868.6567%2475400866600000.55557.9534%17.489371.1496%2.4929%
PrimeNet2570.010963.1579%80001400000.00122.8039%0.012164.1909%1.0330%
GPU722610.175165.5738%80001100000.00111.4135%0.176166.0604%0.4866%
Difference+6+16.7587+3.0829%+2467400+86550000+0.5544+6.5399%+17.3132+5.0892%+5.0892%

Known prime factors (1 factor, 90.9 bits, 0.00518311% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
175471323894868807045488614904475772890.949680876838749285171276
22 × 170219209687321292819
2017-11-134170219209687321292819220,717,3757.295e+111.363e+12

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-07T12:45:00Carsten Kossendeyleela950001567500---0.014--2.412%
2014-04-08T23:01:00Jocelyn LaroucheManual testing100000100000---0.008--0.888%
2014-05-06T21:04:00Jocelyn LaroucheManual testing136578136578---0.011--1.059%
2014-09-16T20:52:00ANONYMOUSManual testing173156173156---0.014--1.202%
2015-04-24T11:46:00mikrMSI247540086660000---0.556--7.953%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-25T00:00:00ANONYMOUSv4_computers21258--0.022--
2016-02-23T16:28:50Mark RoseManual testing258260--0.066--
2010-04-21T18:38:00Architects Cubedi4l_1260261--0.088--
2016-02-23T16:28:50Mark RoseManual testing261262--0.175--
2010-12-13T03:32:00GrunwalderGIMPManual testing21263--0.910--
2016-02-23T16:28:50Mark RoseManual testing262263--0.559--
2015-05-13T21:10:00snme2pm1Manual testing263264--1.119--
2015-05-13T21:10:00snme2pm1Manual testing264265--2.129--
2015-09-06T20:47:00ramgeisManual testing265266--4.259--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.382 GHz-days
Estimated T-Level:24.482
DigitsB1CurvesCompleteFacMiss
2011000251 / 1002.5108.025%
2550000251 / 2800.89640.737%

New Calculation Method

Total ECM effort:17.382 GHz-days
Estimated T-Level:24.482
DigitsB1CompleteFacMiss
20110008.1120.030%
25500000.73348.062%
302500000.04595.590%
3510000000.00299.794%


ECM Summary

B1B2factorcurvesGHz-days
500005000030.126
50000500000025017.19
50000500000010.069


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersC6E02284A1B39E880.095
2015-06-27T00:56:00MadPooManual testingC6E02284A1B39E880.095


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-14T14:24:23Oliver KruseGTX-3
2389486880704548861490447577
4C55D1218BAA32__no
2017-11-14T17:00:12kkmrkkblmbrbkc4.xlarge
2389486880704548861490447577
4C55D1218BAA32__no


P-1 factor-bounds graph:
B1 = 2475400, B2 = 86660000 (P-1 stage 2)
B1 = 2475400 (P-1 stage 1)
B1 = 95000, B2 = 1567500 (P-1 stage 2)
B1 = 173156 (P-1 stage 1)
B1 = 136578 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2020-07-27T11:05:22+00:00