PI MATRIX RECORDS
Rules :
Each line of PI is numbered and there are 50 digits on each line in blocks of five. The candidate is given a number of a line of PI and then has to either recite the line forward or backwards. Or he will be asked to name a certain digit on that line. He also may have to multiply two certain digits on different lines. The candidate has to answer 50 tests and get them all correct.
On 09 October 1999, Creighton Carvello of England was able to pass all these tests on the first 10,050 digits of PI. His attempt took place at the Royal Holloway, University of London, Egham, Surrey, England. Two official witnesses were present.
The following performances have not yet been verified :
G. Uday Shankar, 7,000 digits
Bishwaroop Roy Chowdhury, 4,200 digits
Professor Aitkin, 2,000 digits
EVEREST OF MEMORY TESTS
Rules :
The first 10,000 digits of Pi are divided into 2,000 5digit blocks. The testers call out one of these 5digit sequences, and the candidate must reply with the 5digit numbers on either side of the number chosen. This happens 50 times.
Record holders :
Kevin Horsley 
14 March 2013 
16 min 38.35 sec 
World Record 2013 
12 Feb 2008 
17 min 39 sec 
World Record 2008 

Mark A. Nissen 
23 March 2018 
20 min 17 sec 

Jan Harms 
27 Jul 2007 
20 min 30 sec 
World Record 2007 
28 Aug 1999 
39 min 
World Record 1999 

Philip Bond 
1994 
53 min 
World Record 1994 