is 2 1245091 - 1
has 374810 decimal digits
takes 0.039 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L79F5E679860293B6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26723.864968.6567 %300000100000000.03814.1811 %23.902969.9672 %
Target2600.123465.0000 %50001500000.00060.8329 %0.123965.2915 %
Difference+7+23.7415+3.6567 %+295000+9850000+0.0375+3.3482%+23.7790+4.6757 %

Known prime factors (1 factor, 63.9 bits, 0.00513457% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1245091175732033806333675132063.9307056995585316
22 × 3 × 419 × 1403539297
2010-12-0441914035392971.28183.51436.5637

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-02-24ANONYMOUSv4_computers204820480012--0.0010.993%
2003-11-28eteov4_computers20000020000006--0.0145.865%
2016-03-17alpertronManual testing3000001000000012---8.314%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-17ANONYMOUSv4_computers212570.015
2003-06-01ANONYMOUSv4_computers212580.031
2022-03-07LordJuliusManual testing258260
2022-04-13LordJuliusManual testing21261
2009-02-14Sturle Sundegoscha.ifi2602610.123
2022-04-13LordJuliusManual testing261262
2022-04-13LordJuliusManual testing262263


ECM factoring results:
Total ECM effort:19.068 GHz-days
Estimated T-Level:25.654
DigitsB1CompleteFacMiss
201100014.6920.000%
25500001.60920.008%
302500000.13187.737%
3510000000.00999.133%


ECM Summary

B1B2factorcurvesGHz-days
10.115
50000500000027810.52
25000025000000448.431


Lucas-Lehmer results:
No L-L results for M1245091


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-2
17573203380633367513
8DCA1E3CE47FAE0E
2017-10-20kkmrkkblmbrbkc4.xlarge
17573203380633367513
8DCA1E3CE47FAE0E


CERT results:
No CERT results for M1245091


P-1 factor-bounds graph:
B1 = 300000, B2 = 10000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.65 ~= 69-bit
250
260
270
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Last modified: 2024-02-29T14:28:04+00:00