The two HP-42S's are busy runing the deep pi program and printing their results. The following is the first 24 hours:

Note: FAST refers to Fast Speed, NORM refers to the standard speed. Also, I was using a HP-41CX to print the date and time every 10 minutes. I lost some time marks when my timer printing program didn't adjust for rolling over to a new day at midnight. So there's several hours where the 42S printed results, but I don't know the time frame. This is noted as NO-TIME in the list.

The times given are from the start time to the next ten minute time mark. Thus the actual time will be less that that indicate - up to a maximum of 10 minutes less.

Digit Fast Norm

1 10 Min 20 Min

7 20 Min 40 Min

13 40 Min 1 Hr 20 Min

19 1 Hr 0 Min No Time

25 1 Hr 30 Min No Time

31 No Time No Time

37 No Time No Time

43 No Time 7 Hr 20 Min

49 No Time 9 Hr 20 Min

55 No Time 11 Hr 40 Min

61 No Time 14 Hr 20 Min

67 8 Hr 10 Min 17 Hr 20 Min

73 9 Hr 50 Min 20 Hr 40 Min

79 11 Hr 40 Min 24 Hr 30 Min

85 13 Hr 40 Min 28 Hr 00 Min

91 15 Hr 50 Min

97 18 Hr 20 Min

103 21 Hr 0 Min

109 23 Hr 50 Min

115 27 Hr 00 Min

121 30 Hr 20 Min

It looks like it'll take a long time to reach the 1000th digit. Wonder if the batteries will hold out.

The Fast Mode is a little more than double the speed. At least with this program.