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  • ...}. On the other hand, 15 = 16 − 1 = {{Kbn|4}}, for example, is not a prime, because 15 is divisible by 3 and 5. ...ion; in the 4th century BC [[Euclid]] demonstrated that if M is a Mersenne prime then M(M+1)/2 is a perfect number. Two millennia later, in the 18th century
    5 KB (857 words) - 14:53, 19 September 2021
  • '''LLR (Lucas Lehmer Riesel)''' is probably the fastest [[Primality testing program|program]] available **[[Lucas-Lehmer-Riesel algorithm]] for {{Kbn|k|n}} numbers.
    2 KB (300 words) - 22:00, 16 December 2023
  • {{Riesel prime 521;T:W;C:'''[[M13]]''', {{NWo|512}}
    2 KB (288 words) - 11:41, 3 April 2023
  • {{Riesel prime 521
    898 bytes (66 words) - 14:12, 27 July 2021
  • {{Riesel prime |Rk=521
    1 KB (99 words) - 21:23, 13 August 2022
  • {{Riesel prime |RNash=521
    631 bytes (63 words) - 11:25, 16 August 2021
  • {{Riesel prime 521
    1 KB (109 words) - 22:31, 20 July 2021
  • {{Riesel prime 521
    567 bytes (37 words) - 13:18, 21 March 2024
  • {{Riesel prime 521
    482 bytes (42 words) - 14:02, 2 August 2021
  • {{Riesel prime 521
    597 bytes (39 words) - 13:23, 21 March 2024
  • {{Riesel prime |RNash=521
    193 bytes (21 words) - 12:24, 2 August 2021
  • {{Riesel prime 521
    790 bytes (50 words) - 02:42, 10 August 2021
  • {{Riesel prime 521
    503 bytes (41 words) - 07:53, 16 October 2021
  • {{Riesel prime 521
    414 bytes (35 words) - 08:35, 24 October 2021
  • {{Riesel prime 521
    541 bytes (34 words) - 13:16, 21 March 2024
  • {{Riesel prime 521
    627 bytes (33 words) - 10:55, 21 March 2024