is 2 1954349 - 1
has 588318 decimal digits
takes 0.106 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L7BB1197DA108DC91double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26715.204068.6567 %500000150000000.10155.1089 %15.305570.2580 %
Target2620.314466.1290 %80004500000.00251.1537 %0.316966.5198 %
Difference+5+14.8896+2.5277 %+492000+14550000+0.0990+3.9552%+14.9886+3.7382 %

Known prime factors (1 factor, 74.9 bits, 0.00383226% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1954349351468115019535289268332374.8968991948598216984
23 × 19 × 53 × 1116180312589
2008-11-175311161803125891,957.64,783.78,934.6

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2016-03-17alpertronManual testing5000001500000012---8.164%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-27ANONYMOUSv4_computers212580.020


ECM factoring results:
Total ECM effort:21.573 GHz-days
Estimated T-Level:25.325
DigitsB1CompleteFacMiss
201100010.8010.002%
25500001.02136.040%
302500000.06593.699%
3510000000.00399.694%


ECM Summary

B1B2factorcurvesGHz-days
10.155
500005000000231.601
50000666884070.553
50000675000070.556
50000704145170.567
50000750000021718.14


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15ANONYMOUSv4_computers7BB1197DA108DC910.106
1999-04-02ANONYMOUSv4_computers7BB1197DA108DC910.106
1999-04-13ANONYMOUSv4_computers7BB1197DA108DC910.106


PRP results:
dateuseridcompidcofactorsres64
2017-10-05Oliver KruseGTX-2
35146811501953528926833
3439AD76C5BBDB83
2017-11-15kkmrkkblmbrbkc4.xlarge
35146811501953528926833
3439AD76C5BBDB83


CERT results:
No CERT results for M1954349


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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101
102
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106
100
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105
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109
1010
1011
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1013
TF factor-bounds graph:
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=25.33 ~= 68-bit
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280
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Last modified: 2024-02-29T14:28:04+00:00