is 2 8252219 - 1
has 2484166 decimal digits
takes 2.155 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L18371A027388C8F2double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.600765.6716 %300001050000.01291.0767 %3.613666.0413 %
Target2687.222966.1765 %5000055000000.13142.1817 %7.354266.9144 %
Difference-1-3.6222-0.5048 %-20000-5395000-0.1184-1.1050 %-3.7406-0.8731 %

Known prime factors (1 factor, 68.7 bits, 0.00083258% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
82522194816408632244524675532168.70729182506137104
24 × 301577 × 6047897
2012-02-21301577604789714.0030.23270.2330

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-08-17REThernv4_computers30000105000--0.0130.930%
2012-02-21Carsten Kossendeymother2168.7070.5030.000%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-29ANONYMOUSv4_computers212620.037
1999-02-07ANONYMOUSv4_computers212630.119
2002-08-17REThernv4_computers212640.238


ECM factoring results:
No ECM results for M8252219


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-21J Moseleyv4_computers18371A027388C8F22.155
2002-09-29REThernv4_computers18371A027388C8F22.155


PRP results:
dateuseridcompidcofactorsres64
2018-09-26ATHec2-PRPCF
481640863224452467553
ED65D552E525E90C
2020-03-27ANONYMOUSKL-SCH04
481640863224452467553
ED65D552E525E90C


CERT results:
No CERT results for M8252219


P-1 factor-bounds graph:
B1 = 30000, B2 = 105000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
TF factor-bounds graph:
264
263
262
this exponent TF target: 68
TF double-checked to: 67
250
260
270
JSON version of this page
Last modified: 2024-03-13T02:15:48+00:00