is 2 14867 - 1
has 4476 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4DC3F73474687DC3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2671,998.649279.1045%1000000000000140107589366357613026,380,250.706245.8478%26,382,249.355488.6846%
Target2440.000268.1818%500800000.00001.4263%0.000268.6356%
Difference+23+1,998.6490+10.9227%+999999999500+1401075893663496130+26,380,250.7062+44.4215%+26,382,249.3552+20.0490%

Known prime factors:
No known factors for M14867

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-04-29ANONYMOUSv4_computers10000010000000---0.000--1.742%
2001-07-17Alex Kruppav4_computers1000000100000000---0.002--4.379%
2001-10-06ANONYMOUSv4_computers430000004290000000---0.095--10.750%
2002-04-28ANONYMOUSv4_computers163841638400---3.62019e-5--0.561%
2002-06-09ANONYMOUSv4_computers327683276800---7.24038e-5--0.918%
2002-07-14ANONYMOUSv4_computers655366553600---0.000--1.393%
2003-02-02ANONYMOUSv4_computers13107213107200---0.000--1.989%
2003-03-27ANONYMOUSv4_computers26214426214400---0.001--2.703%
2003-04-03ANONYMOUSv4_computers52428852428800---0.001--3.524%
2003-04-27ANONYMOUSv4_computers1048576104857600---0.002--4.445%
2003-05-19ANONYMOUSv4_computers2097152209715200---0.005--5.457%
2003-07-06ANONYMOUSv4_computers4194304419430400---0.009--6.556%
2003-09-29ANONYMOUSv4_computers8388608838860800---0.019--7.734%
2003-09-29ANONYMOUSv4_computers167772161677721600---0.037--8.981%
2011-05-18Jocelyn LaroucheManual testing400000000400000000---0.138--7.877%
2012-10-12Jocelyn LaroucheManual testing576696497576696497---0.199--8.438%
2013-03-21Le ComteManual testing1500000000150000000000---3.314--17.768%
2013-03-22Le ComteS7612000000000200000000000---4.419--18.345%
2013-04-02bcp19Toshiba-740Q10000000000100000000000---5.150--17.493%
2018-06-25James Hintz3_1_201823390249707175426872802512---40.67--22.748%
2022-03-26-Anonymous-T5810100000000000100013732677278420---1,883,125--40.549%
2023-04-14-Anonymous-T581010000000000001401075893663576130---26,380,251--45.848%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-11ATH5960X100000000024100000000027--4.954


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-09-14ANONYMOUSv4_computers252253--0.040--
2000-03-01ANONYMOUSv4_computers253254--0.081--
2000-09-15ANONYMOUSv4_computers21256--0.646--
2002-09-07ANONYMOUSv4_computers21257--1.291--
2016-02-23LaurVManual testing257258--1.291--
2010-07-04George WoltmanManual testing258259--2.583--
2010-07-04George WoltmanManual testing259260--5.165--
2012-12-25bcp19Manual testing260261--10.33--
2015-08-02snme2pm1G1261262--20.66--
2016-07-31Sid & AndyWoody262263--66.03--
2018-08-28Anton RepkoManual testing263264--132.1--
2018-12-24Anton RepkoManual testing264265--251.3--
2021-11-21Ruslan BorisovManual testing265266--502.6--


ECM factoring results:
Total ECM effort:10,709.171 GHz-days
Estimated T-Level:47.540
DigitsB1CompleteFacMiss
20110004,018.0530.000%
25500001,446.7300.000%
30250000401.8140.000%
35100000093.3190.000%
40300000018.4820.000%
45110000003.2393.922%
50440000000.50860.173%
551100000000.07293.007%
602600000000.01099.050%
658000000000.00199.897%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002800.070
10000001000000002,15310.71
30000003000000001111.656
1100000011000000007,997437.4
430000002404906604262,48010,005
4400000044000000001,161254.0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1997-01-01George Woltman4DC3F73474687DC33.54330e-6
2015-04-11MadPooManual testing4DC3F73474687DC33.54330e-6


PRP results:
No PRP results for M14867


P-1 factor-bounds graph:
B1 = 1000000000000, B2 = 1401075893663576130 (P-1 stage 2)
B1 = 100000000000, B2 = 100013732677278420 (P-1 stage 2)
B1 = 1000000000000 (P-1 stage 1)
B1 = 23390249707, B2 = 1754268728025 (P-1 stage 2)
B1 = 100000000000 (P-1 stage 1)
B1 = 23390249707 (P-1 stage 1)
B1 = 10000000000, B2 = 100000000000 (P-1 stage 2)
B1 = 2000000000, B2 = 200000000000 (P-1 stage 2)
B1 = 10000000000 (P-1 stage 1)
B1 = 1500000000, B2 = 150000000000 (P-1 stage 2)
B1 = 2000000000 (P-1 stage 1)
B1 = 1500000000 (P-1 stage 1)
B1 = 576696497 (P-1 stage 1)
B1 = 400000000 (P-1 stage 1)
B1 = 43000000, B2 = 4290000000 (P-1 stage 2)
B1 = 16777216, B2 = 1677721600 (P-1 stage 2)
B1 = 8388608, B2 = 838860800 (P-1 stage 2)
B1 = 43000000 (P-1 stage 1)
B1 = 4194304, B2 = 419430400 (P-1 stage 2)
B1 = 16777216 (P-1 stage 1)
B1 = 2097152, B2 = 209715200 (P-1 stage 2)
B1 = 8388608 (P-1 stage 1)
B1 = 1048576, B2 = 104857600 (P-1 stage 2)
B1 = 1000000, B2 = 100000000 (P-1 stage 2)
B1 = 4194304 (P-1 stage 1)
B1 = 524288, B2 = 52428800 (P-1 stage 2)
B1 = 2097152 (P-1 stage 1)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 1048576 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 100000, B2 = 10000000 (P-1 stage 2)
B1 = 524288 (P-1 stage 1)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 16384, B2 = 1638400 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
B1 = 16384 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 44
TF double-checked to: 67.8
ECM T-Level=47.54 ~= 141-bit
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Last modified: 2023-06-05T21:50:05+00:00