is 2 1992953 - 1
has 599939 decimal digits
takes 0.131 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7262924036C08E88double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual271239.884470.4225 %2000000054622896900285.527814.7416 %525.412274.7827 %
Target2620.308366.1290 %80005500000.00361.2357 %0.311866.5476 %
Difference+9+239.5761+4.2935 %+19992000+54622346900+285.5243+13.5058%+525.1004+8.2351 %

Known prime factors:
No known factors for M1992953

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2011-03-04kurlykurlytop10000003000000012--0.2469.658%
2018-02-02JossManual testing19929533000000012--0.33510.053%
2018-02-15JossManual testing19929536000000012--0.49111.173%
2018-03-10JossManual testing199295312000000012--0.80312.281%
2018-05-21JossManual testing199295319929530012--1.21513.084%
2018-11-26JossManual testing199295324911912512--1.47413.435%
2022-05-06RichD0Linux-7b2000000054622896900--293.424.296%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-08-13masserManual testing14000004620000027--0.374


Trial Factoring results:
575859606162636465666768697071
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-02David Campeauv4_computers212580.019
2016-02-23Mark RoseManual testing2582600.058
2009-12-09S485122USB-W2602610.077
2011-05-03XyzzyManual testing2612653.507
2014-01-04Never Odd Or EvenManual testing265270116.2
2015-10-23ramgeisManual testing270271120.0


ECM factoring results:
Total ECM effort:31.775 GHz-days
Estimated T-Level:25.384
DigitsB1CompleteFacMiss
201100010.8020.002%
25500001.07834.034%
302500000.07792.606%
3510000000.00499.563%


ECM Summary

B1B2factorcurvesGHz-days
50000500000018813.92
50000540000070.531
50000675000070.587
500007500000484.878
250000180168450811.86


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29Stephen Woodv4_computers7262924036C08E880.131
2015-07-06MadPooManual testing7262924036C08E880.131


PRP results:
No PRP results for M1992953


CERT results:
No CERT results for M1992953


P-1 factor-bounds graph:
B1 = 20000000, B2 = 54622896900 (P-1 stage 2)
B1 = 20000000 (P-1 stage 1)
B1 = 1992953, B2 = 249119125 (P-1 stage 2)
B1 = 1992953, B2 = 199295300 (P-1 stage 2)
B1 = 1992953, B2 = 120000000 (P-1 stage 2)
B1 = 1992953, B2 = 60000000 (P-1 stage 2)
B1 = 1992953, B2 = 30000000 (P-1 stage 2)
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1992953 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
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TF factor-bounds graph:
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this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.38 ~= 68-bit
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Last modified: 2024-03-13T02:15:48+00:00