≡ is the symbol used to show congruence in modulo arithmetic. It can be thought of as an equivalent to the = sign we use for normal arithmetic. Examples of its use could be:

  • 3 ≡ 3 (mod 2)
  • 2 ≡ 6 (mod 4)
  • 1932*10^63 ≡ 0 (mod 10)

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