I am trying to convert a long string of numbers to a number, but get a
java.lang.numberformatexception


My long string of numbers has new line characters in it, so I am
filtering out the newline characters before converting it back to a
string.  Then I try to use Integer. on it but get the above exception.

Code is as follows:
big-num-str is truncated for space's sake, is actually much much
longer!!

(def big-num-str "37107287533902102798797998220837590246510135740250
46376937677490009712648124896970078050417018260538
74324986199524741059474233309513058123726617309629
91942213363574161572522430563301811072406154908250
23067588207539346171171980310421047513778063246676
89261670696623633820136378418383684178734361726757
28112879812849979408065481931592621691275889832738
44274228917432520321923589422876796487670272189318
47451445736001306439091167216856844588711603153276
70386486105843025439939619828917593665686757934951....")

(Integer. (apply str (filter #(Character/isDigit %) big-num-str)))

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