is 2 1501207 - 1
has 451909 decimal digits
takes 0.067 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L1DD511AFB5FFD176double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26719.793468.6567 %30000002730000001.14709.3942 %20.940471.6012 %
Target2610.204665.5738 %60002500000.00120.9481 %0.205965.9002 %
Difference+6+19.5887+3.0829 %+2994000+272750000+1.1458+8.4460%+20.7345+5.7010 %

Known prime factors (2 factors, 134.5 bits, 0.00896040% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1501207178727850809768044632063.9545952805003233
35 × 11 × 37 × 107 × 562519
2008-02-192435625191.06320.00200.0037
150120717401502337749377715932270.560579583706236028
22 × 132 × 38153 × 22471951
2019-05-103815322471951159.170.08160.1481

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012
skipped known factor: 17872785080976804463
---8.677%
2021-07-25Dylan Delgadolaptop-ryzen737003000000273000000
skipped known factor: 17872785080976804463
skipped known factor: 1740150233774937771593
--1.14714.562%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2003-07-21ANONYMOUSv4_computers212580.026


ECM factoring results:
Total ECM effort:30.024 GHz-days
Estimated T-Level:25.701
DigitsB1CompleteFacMiss
201100014.5380.000%
25500001.64019.395%
302500000.14086.925%
3510000000.01099.024%


ECM Summary

B1B2factorcurvesGHz-days
10.127
50000500000024213.48
50000500000060.334
250000350000005016.08


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-10-25ANONYMOUSv4_computers1DD511AFB5FFD1760.067


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-3
17872785080976804463
DCB729907C5BAFEC
2017-10-29kkmrkkblmbrbkc4.xlarge
17872785080976804463
DCB729907C5BAFEC
2019-05-10ATHec2-PRPCF
17872785080976804463
1740150233774937771593
130CCC319180BB3B
2019-05-17krackerGRID-11
17872785080976804463
1740150233774937771593
130CCC319180BB3B


CERT results:
No CERT results for M1501207


P-1 factor-bounds graph:
B1 = 3000000, B2 = 273000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
TF factor-bounds graph:
258
this exponent TF target: 61
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
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280
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Last modified: 2024-02-09T03:30:02+00:00