C:\test\C>gcm
anonyM: gcm  for s=2147483648 & r=1 to 1073741824 took: 33.920637491715 
anonyM: gcm2 for s=2147483648 & r=1 to 1073741824 took: 46.151947659089 
oiskuu: gcm  for s=2147483648 & r=1 to 1073741824 took:330.492011773110