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The rules and verification procedures for setting a record in memorizing five-digit blocks from pi. The record involves randomly recalling five digits, along with the two preceding and following blocks, without errors, for a total of 50 blocks. The document also explains the importance of randomness and the role of independent judges in the process. The verification rules include filming the event, having it take place in a public place, and having experienced timekeepers and judges to ensure accuracy.
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A five digit number is randomly selected from the first 10,000 digits of Pi and called out. The record breaker states the five digits before and after, and then the next block is called out. This is repeated 50 times. The record is for the time taken to recall the event, with no errors.
The five digit blocks must be randomly taken from any page. The number must not follow on each other from each of the thousand groups. It must be chosen randomly. EXAMPLE Group one – the 4000th^ digit area, Group two – 7000th^ area, Group three – 2000th^ area etc.
It does not matter which block is recalled first HOWEVER the order must be clear. The default is that the first block is recalled first. EXAMPLE Saying "83279 and 41971" is correct
Saying "41971 is the second block and 83279 is the first block" is also correct as the order is identified.
EXAMPLE Judge: "26535" Record breaker: “14159 and 89763, no that is 89793. Next” Judge: "Correct. 76397" Record breaker: “55418 comes first then 92934, no 92933. Next” Judge: “Correct. 73455" etc.
This just avoids failing to break a record because one says six when one means seven (it does happen when recalling 500 digits). This way a "verbal typo" can be corrected.
Independent judges pick digits from a copy of the sheets. Each sheet is to have 2000 or 1000 digits, and be used equally often.
EXAMPLE With 10,000 decimals (2000 digits per page) there are 5 sheets and 50 attempts, so each sheet is to be used 10 times. Or, 10 sheets (1000 digits per page) and 50 attempts, so each sheet is used 5 times. This ensures that the record breaker has learnt all sheets equally well, and that the judges are not picking from only a few sheets.