is 2 2445923 - 1
has 736297 decimal digits
takes 0.165 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L15604DFD1AA82BD7double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.148367.1642%2000000600000000.50557.6301%12.653869.6696%2.5054%
PrimeNet2590.031462.7119%100001800000.00192.5275%0.033363.6543%0.9424%
GPU722630.652565.0794%100001500000.00171.3072%0.654265.5358%0.4565%
Difference+4+11.4958+2.0848%+1990000+59850000+0.5037+6.3229%+11.9995+4.1337%+4.1337%

Known prime factors (1 factor, 72.7 bits, 0.00297186% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
244592376151923953312072215592272.6891556711391840873
3 × 518903797280291
2017-11-283518903797280291576.622,769,3325,172,341

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-14T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.289%
2003-10-31T00:00:00Team Prime Ribv4_computers15000217500---0.003--0.902%
2010-11-19T00:04:00Jocelyn LaroucheManual testing2000020000---0.002--0.312%
2011-01-18T20:01:00Oscar Östlin950001947500---0.019--2.673%
2014-01-24T11:26:00mikrMSI117200048000000---0.365--7.026%
2018-09-28T16:26:39alpertronManual testing20000006000000012---0.505--7.630%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:14Mark RoseManual testing21260--0.063--
2009-01-14T06:38:00Sturle Sundeletov.ifi260261--0.063--
2011-10-04T04:18:00Sebastian HornbostelManual testing261262--0.126--
2013-12-04T21:13:00Jerry HallettManual testing262263--0.401--
2015-02-27T20:41:00VictordeHollanderManual testing263264--0.803--
2015-02-27T20:41:00VictordeHollanderManual testing264265--1.528--
2015-10-25T20:35:03ramgeisManual testing265266--3.055--
2017-07-12T11:35:14Gordon SpenceManual testing266267--6.110--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.499 GHz-days
Estimated T-Level:1.400
DigitsB1CurvesCompleteFacMiss
201100028 / 1000.28075.472%
255000028 / 2800.10090.468%

New Calculation Method

Total ECM effort:2.499 GHz-days
Estimated T-Level:1.400
DigitsB1CompleteFacMiss
20110000.90340.526%
25500000.08292.161%
302500000.00599.499%


ECM Summary

B1B2factorcurvesGHz-days
500005000000272.410
50000500000010.089


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers15604DFD1AA82BD70.165
1999-05-16T00:00:00ANONYMOUSv4_computers15604DFD1AA82BD70.165


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-29T13:23:43kkmrkkblmbrbkc4.xlarge
7615192395331207221559
F7B7D01D9292F5__no
2017-11-29T13:48:33ATHec2-1xf
7615192395331207221559
F7B7D01D9292F5__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 1172000, B2 = 48000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 1172000 (P-1 stage 1)
B1 = 95000, B2 = 1947500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 217500 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2018-09-28T16:26:39+00:00