Obligatory informational: JavaScript numbers are IEEE-754 standard. You get 53 bits of precision, but can still represent other numbers outside that range, and

Obligatory informational: JavaScript numbers are IEEE-754 standard. You get 53 bits of precision, but can still represent other numbers outside that range, and there are the usual issues relating to dealing with floats. Math.pow(2,53) // 9007199254740992 Math.pow(2,53)+1 // 9007199254740992 Math.pow(2,53)+2 // 9007199254740994 0.1 + 0.2 // 0.30000000000000004