From: foldes.laszlo2@... Date: 2020-10-05T00:35:36+00:00 Subject: [ruby-core:100297] [Ruby master Bug#17214] BigDecimal exponentiation gives incorrect results Issue #17214 has been reported by karatedog (F�ldes L�szl�). ---------------------------------------- Bug #17214: BigDecimal exponentiation gives incorrect results https://bugs.ruby-lang.org/issues/17214 * Author: karatedog (F�ldes L�szl�) * Status: Open * Priority: Normal * ruby -v: ruby 2.7.1p83 (2020-03-31 revision a0c7c23c9c) [x86_64-linux] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN ---------------------------------------- > (BigDecimal("2222") ** BigDecimal("3.5")).to_i => 517135311000 This is an incorrect value. > 2222 ** 3.5 => 517135308457.25256 This is the correct value (within Float precision). As the Base gets larger, the problem is more visible: > (BigDecimal("22222") ** BigDecimal("3.5")).to_i => 1635840670000000 Wrong value, number of trailing zeroes increase. > 22222 ** 3.5 => 1635840670214066.5 (nearing maximum Float precision) -- https://bugs.ruby-lang.org/ Unsubscribe: