[Help-glpk] Meaning of the integer problem columns console output

[Carlos Herrera]

What is the meaning of the columns in the output by console of a integer
problem?

Example:

Integer optimization begins...
Objective function is integral
      ?                                                         ?
+    56: mip =     not found yet <=              +inf        (1; 0)
+   243: mip =   2.287300000e+04 <=   2.458500000e+04   7.5% (96; 0)

Thanks!

Carlos