I'm talking about runtimes:

2 core machine:

233906	233906	9780	Completed and validated   44,623.90	5,365.19	4,744.74   YAFU v134.01 (mt)

Longer runtime, 4 core, faster machine (running 3 cores), 1/26th of the credit:

235322	235322	9569	Completed and validated   45,438.71	21,268.38	180.60	   YAFU v134.01 (mt)

Example 2, 3 identical machines:

239586	239586	9780	Completed and validated   84,372.99	12,292.74	2,787.18   YAFU v134.01 (mt)

239579	239579	9571	Completed and validated   92,866.80	12,787.03	673.78	   YAFU v134.01 (mt)

237997	237997	9570	Completed and validated   91,559.31	12,914.54	576.07 	   YAFU v134.01 (mt)

I even do not understand creditnew :(