is 2 2546429 - 1
has 766552 decimal digits
takes 0.177 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA92C390B5756C416double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26946.884068.1159%30000001350000001.02507.6217%47.909070.5460%2.4301%
PrimeNet2590.030262.7119%110002000000.00212.6846%0.032363.7129%1.0010%
GPU722630.626865.0794%120001800000.00211.4776%0.628965.5954%0.5160%
Difference+6+46.2572+3.0366%+2988000+134820000+1.0229+6.1441%+47.2801+4.9507%+4.9507%

Known prime factors:
No known factors for M2546429

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-23T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.190%
2003-11-08T00:00:00Team Prime Ribv4_computers15000198750---0.003--0.644%
2010-12-19T21:42:00Jocelyn LaroucheManual testing2000020000---0.002--0.222%
2011-01-08T14:34:00Jocelyn LaroucheManual testing5000050000---0.005--0.454%
2011-02-23T07:18:00James Heinrichi7-9203000008000000---0.072--3.569%
2018-08-17T10:20:07Jocelyn Larouchelow 4M60000060000006---0.090--3.664%
2018-10-05T20:39:28mikrMSI300000013500000012---1.025--7.622%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00Ethan O'Connorv4_computers21259--0.030--
2016-02-23T16:29:16Mark RoseManual testing259260--0.030--
2009-02-01T19:00:00Sturle Sundeletov.ifi260261--0.060--
2012-06-15T17:43:00Sebastian HornbostelManual testing261262--0.121--
2013-01-14T11:53:00dbaughManual testing262263--0.386--
2015-02-23T17:24:00VictordeHollanderManual testing263264--0.771--
2015-02-23T17:24:00VictordeHollanderManual testing264265--1.467--
2015-11-08T21:02:57ramgeisManual testing265266--2.935--
2017-08-08T13:42:11Gordon SpenceManual testing266267--5.869--
2019-03-11T11:16:30TJAOIManual testing267268--11.74--
2021-06-17T12:14:11TJAOIManual testing268269--23.48--


ECM factoring results:

Old Calculation Method

Total ECM effort:14.429 GHz-days
Estimated T-Level:22.696
DigitsB1CurvesCompleteFacMiss
2011000151 / 1001.51021.924%
2550000151 / 2800.53958.260%

New Calculation Method

Total ECM effort:14.429 GHz-days
Estimated T-Level:22.696
DigitsB1CompleteFacMiss
20110005.9200.269%
25500000.54857.807%
302500000.03596.594%
3510000000.00299.838%


ECM Summary

B1B2factorcurvesGHz-days
50000500000011610.69
500006750000212.223
50000690000070.749
50000715000070.763


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-04-02T00:00:00Ethan O'Connorv4_computersA92C390B5756C4160.177
2018-06-11T07:28:35kkmrkkblmbrbkoldA92C390B5756C4160.177


PRP results:
No PRP results for M2546429


P-1 factor-bounds graph:
B1 = 3000000, B2 = 135000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 600000, B2 = 6000000 (P-1 stage 2)
B1 = 300000, B2 = 8000000 (P-1 stage 2)
B1 = 600000 (P-1 stage 1)
B1 = 300000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 15000, B2 = 198750 (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: 2022-04-26T09:12:31+00:00