is 2 1482907 - 1
has 446400 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-L2261B0C0FE7E0E39double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.037668.6567%14829071631197700.56968.2106%20.607271.2302%2.5735%
PrimeNet2570.012963.1579%65001000000.00062.3350%0.013664.0182%0.8603%
GPU722610.207165.5738%6000500000.00050.9455%0.207665.8993%0.3255%
Difference+6+19.8305+3.0829%+1476907+163069770+0.5692+7.2651%+20.3996+5.3309%+5.3309%

Known prime factors (1 factor, 78.8 bits, 0.00531092% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14829075104299689570670415287592478.756172104511259663297
7 × 67 × 366960578378813
2019-05-176736696057837881375,7451,106,8502,067,287

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers20000270000---0.002--0.964%
2010-12-25T13:50:00Rob_Deetwopc100000200000---0.006--1.221%
2010-12-26T18:29:00Rob_Deetwopc200000300000---0.011--1.525%
2010-12-27T13:24:00Rob_Deetwopc2000001000000---0.013--2.340%
2010-12-28T13:17:00Rob_Deetwopc2000002000000---0.017--2.829%
2010-12-29T12:50:00Rob_Deetwopc2000003000000---0.020--3.121%
2010-12-30T14:13:00Rob_Deetwopc2000004000000---0.023--3.331%
2010-12-31T13:26:00Rob_Deetwopc2000005000000---0.026--3.495%
2014-11-25T02:49:00Jocelyn LaroucheManual testing243283243283---0.013--1.388%
2015-01-29T22:02:00Jocelyn LaroucheManual testing323809323809---0.018--1.592%
2015-02-12T12:33:00Jocelyn LaroucheManual testing391807391807---0.022--1.737%
2015-02-23T15:50:00Jocelyn LaroucheManual testing430987430987---0.024--1.812%
2015-03-01T03:15:00Jocelyn LaroucheManual testing474085474085---0.026--1.889%
2015-03-05T14:27:00Jocelyn LaroucheManual testing521493521493---0.029--1.968%
2015-03-14T11:30:00Jocelyn LaroucheManual testing573642573642---0.032--2.049%
2015-03-15T13:58:00alpertronManual testing200000060000000---0.286--7.246%
2018-03-17T12:03:58Jocelyn Larouchelow 4M14829076000000012---0.259--7.060%
2018-03-18T11:02:22Jocelyn Larouchelow 4M148290714829070012---0.525--8.100%
2018-10-15T23:02:58Jocelyn Larouchelow 4M148290716311977012---0.570--8.211%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-14T00:00:00ANONYMOUSv4_computers21257--0.013--
2003-07-30T00:00:00ANONYMOUSv4_computers21258--0.026--
2016-02-23T16:28:34Mark RoseManual testing258260--0.078--
2010-05-07T08:50:00Architects Cubedm1_f2260261--0.104--
2016-02-23T16:28:34Mark RoseManual testing261262--0.207--
2011-04-05T20:59:00GrunwalderGIMPManual testing21263--1.076--
2016-02-23T16:28:34Mark RoseManual testing262263--0.662--
2015-04-05T20:45:00snme2pm1Manual testing263264--1.324--
2015-04-05T20:45:00snme2pm1Manual testing264265--2.520--
2015-09-23T08:42:49ramgeisManual testing265266--5.039--
2018-02-19T12:08:17TJAOIManual testing266267--10.08--


ECM factoring results:

Old Calculation Method

Total ECM effort:26.553 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:26.553 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100014.6540.000%
25500001.67418.740%
302500000.14486.623%
3510000000.01099.005%


ECM Summary

B1B2factorcurvesGHz-days
5000050000001446.844
5000050000001075.085
250000400000005014.62


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-21T00:00:00ANONYMOUSv4_computers2261B0C0FE7E0E390.057
2015-07-19T16:37:00MadPooManual testing2261B0C0FE7E0E390.057


PRP results:
dateuseridcompidcofactorsres64PRP
2019-05-17T12:48:15ATHec2-PRPCF
510429968957067041528759
89CB2A579864442Bno
2019-05-18T11:17:56marssystemssystem11
510429968957067041528759
89CB2A579864442Bno


P-1 factor-bounds graph:
B1 = 1482907, B2 = 163119770 (P-1 stage 2)
B1 = 1482907, B2 = 148290700 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 1482907, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1482907 (P-1 stage 1)
B1 = 573642 (P-1 stage 1)
B1 = 521493 (P-1 stage 1)
B1 = 474085 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 430987 (P-1 stage 1)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 391807 (P-1 stage 1)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 323809 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 243283 (P-1 stage 1)
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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Last modified: 2022-04-07T09:48:13+00:00