7825 (number)

In mathematics

• 7825 is the smallest number when it is impossible to assign two colors to the first few natural numbers such that every Pythagorean triple is multicolored, i.e. where the Boolean Pythagorean triples problem becomes false. The 200-terabyte proof to verify this is the largest ever made.
• 7825 is a magic constant of n × n normal magic square and n-Queens Problem for n = 25.