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Are factorials larger than 20, 25 even possible in php? Usually in php to handle this you'd have to install an extension, but that's not really an option for hackerrank, I expect.
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Extra Long Factorials
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Are factorials larger than 20, 25 even possible in php? Usually in php to handle this you'd have to install an extension, but that's not really an option for hackerrank, I expect.