is 2 1808459 - 1
has 544401 decimal digits
takes 0.098 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 L-L tests remaining
ResidueStatus
L-L73026144579AD3DCdouble-checked
PRP2B2E3F3322A40FF2

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26832.958969.1176%30000003930000001.90749.2838%34.866471.9847%2.8671%
PrimeNet2570.010663.1579%80001500000.00122.8727%0.011964.2163%1.0584%
GPU722610.169965.5738%90001300000.00121.5559%0.171166.1094%0.5356%
Difference+7+32.7891+3.5439%+2991000+392870000+1.9062+7.7280%+34.6953+5.8753%+5.8753%

Known prime factors (1 factor, 119.2 bits, 0.00659188% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
180845976955979162008348564706196104314200936119.212212766723387172030343807064756
22 × 3 × 7 × 112 × 17 × 13933 × 463889 × 761227 × 250274863
2021-07-147612272502748639.938e+101.12922.0033

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2011-02-10T06:34:00Carsten Kossendeyleela1000001650000---0.015--2.197%
2014-05-12T10:21:00Jocelyn LaroucheManual testing135491135491---0.011--0.924%
2014-09-20T22:31:00Jocelyn LaroucheManual testing170982170982---0.013--1.051%
2015-05-09T09:13:00mikrMSI278000091760000---0.600--7.481%
2018-09-19T19:34:23Jocelyn Larouche low 4MManual testing180845918084590012---0.910--7.977%
2021-07-14T08:30:55Dylan Delgadolaptop-ryzen73700300000039300000036119.2121.9070.1963.8159.284%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-01-16T00:00:00ANONYMOUSv4_computers?258--0.021--
2016-02-23T16:28:53Mark RoseManual testing258260--0.064--
2010-04-13T12:48:00For Researchm1_tt260261--0.085--
2016-02-23T16:28:53Mark RoseManual testing261262--0.170--
2011-01-21T16:10:00GrunwalderGIMPManual testing21263--0.883--
2016-02-23T16:28:53Mark RoseManual testing262263--0.543--
2015-04-21T22:20:00snme2pm1Manual testing263264--1.086--
2015-04-21T22:20:00snme2pm1Manual testing264265--2.066--
2015-09-01T08:49:00ramgeisManual testing265266--4.132--
2018-04-30T12:03:46TJAOIManual testing266267--8.264--
2019-06-24T09:36:05TJAOIManual testing267268--16.53--


ECM factoring results:

Old Calculation Method

Total ECM effort:18.931 GHz-days
Estimated T-Level:24.875
DigitsB1CurvesCompleteFacMiss
2011000273 / 1002.7306.433%
2550000273 / 2800.97537.653%

New Calculation Method

Total ECM effort:18.931 GHz-days
Estimated T-Level:24.875
DigitsB1CompleteFacMiss
20110008.8310.015%
25500000.79944.976%
302500000.04995.194%
3510000000.00299.774%


ECM Summary

B1B2factorcurvesGHz-days
50000500000026518.28
50000675000070.550
74000740000010.102


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computers73026144579AD3DC0.098
2015-07-18T18:31:00MadPooManual testing73026144579AD3DC0.098


PRP results:
dateuseridcompidcofactorsres64PRP
2021-07-14T15:20:31SRJ2877LTOS
769559791620083485647061961043142009
2B2E3F3322A40FF2no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 393000000 (P-1 stage 2)
B1 = 1808459, B2 = 180845900 (P-1 stage 2)
B1 = 2780000, B2 = 91760000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2780000 (P-1 stage 1)
B1 = 1808459 (P-1 stage 1)
B1 = 100000, B2 = 1650000 (P-1 stage 2)
B1 = 170982 (P-1 stage 1)
B1 = 135491 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
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TF factor-bounds graph:
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2120
Last modified: 2021-07-14T15:20:31+00:00