Count

Out of context: Reply #397

• Started
• Last post
• 1,061 Responses

• hans_glib0

  

  397 is a prime number.

  397 is conjectured to be the largest prime that can be represented uniquely as the sum of three positive squares (32 + 82 + 182).

  397 is a Cuban prime. Cuban primes, named after differences between successive cubic numbers, have the form n3 - (n - 13).

  397 has a representation as a sum of two squares: 397 = 62 + 192.

  397 is the hypotenuse of a primitive Pythagorean triple: 3972 = 2282 + 3252.

  hans_glib 0Permalink

  UpvoteDownvote

  Flag

  • hmm some formating lost in the copy&pastehans_glib

  Show [[ numHiddenNotes ]] more notesAdd Note

  SaveCancel

View thread