IGRP and EIGRP metric size

in CCNA & CCENT
how many bits long is the metric for an IGRP and EIGRP?
i read in the Cisco press book that the max metric for an IGRP is 4 billion something...which would make it 32 bits long...and since EIGRP is 256 times IGRP it should making it 40 bits long, but i have found different answers else where so i was getting a little confused.
thanks
i read in the Cisco press book that the max metric for an IGRP is 4 billion something...which would make it 32 bits long...and since EIGRP is 256 times IGRP it should making it 40 bits long, but i have found different answers else where so i was getting a little confused.
thanks
:: PEACE ::
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