Because the literal is readed as BigInt:

user=> (class 6546546546546546546850348954895480584039545804 )
clojure.lang.BigInt

2015-09-04 22:48 GMT+08:00 Ali M <tclwarr...@gmail.com>:

> why?
>
> <REPL>
> user=> (+ 6546546546546546546850348954895480584039545804
> 7548979534287548957345843954749357348757897)
> 6554095526080834095807694798850229941388303701N
>
> user=> (+ Long/MAX_VALUE Long/MAX_VALUE)
>
> ArithmeticException integer overflow
> clojure.lang.Numbers.throwIntOverflow (Numbers.java:1501)
>
> user=> Long/MAX_VALUE
> 9223372036854775807
> </REPL>
>
> Why the much bigger numbers get promoted, and a smaller number overflows?
>
> Thank you
> Ali
>
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