is 2 1244909 - 1
has 374755 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-LC16904A61D4A3D0Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26723.868368.6567 %300000100000000.03814.1810 %23.906469.9672 %
Target2600.123465.0000 %50001500000.00060.8329 %0.124065.2915 %
Difference+7+23.7450+3.6567 %+295000+9850000+0.0375+3.3481%+23.7825+4.6757 %

Known prime factors (1 factor, 70.2 bits, 0.00563746% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
124490913386389860576179805212270.181537645316267140
22 × 3 × 5 × 31 × 101 × 787 × 3636527
2010-12-047873636527191.940.00910.0170

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-02-24ANONYMOUSv4_computers204820480012--0.0010.993%
2003-11-28eteov4_computers20000020000006--0.0145.864%
2016-03-17alpertronManual testing3000001000000012
skipped known factor: 1338638986057617980521
---8.313%


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
2022-04-13LordJuliusManual testing263264


ECM factoring results:
Total ECM effort:20.333 GHz-days
Estimated T-Level:25.684
DigitsB1CompleteFacMiss
201100015.0920.000%
25500001.65619.090%
302500000.13787.221%
3510000000.00999.079%


ECM Summary

B1B2factorcurvesGHz-days
10.115
50000500000027810.52
25000035000000449.70


Lucas-Lehmer results:
No L-L results for M1244909


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-2
1338638986057617980521
1CAC8C8278D117A3
2017-10-20kkmrkkblmbrbkc4.xlarge
1338638986057617980521
1CAC8C8278D117A3


CERT results:
No CERT results for M1244909


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
TF factor-bounds graph:
264
263
262
261
260
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.68 ~= 69-bit
250
260
270
280
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Last modified: 2024-02-29T14:28:04+00:00