the results show no significant effect of age on the difference between digit span. Memory skill encoding process memorist superior memory time constraint. This article studies Chao Lu, who set a Guinness World Record by memorizing 67,890 decimals of pi. A sample of 1,000 subjects with ages ranging from 16 years to 79 years was used to test this hypothesis. Remembering the last words in the list is called the recency effect and has particular characteristics. His memory performance supports the feasibility of acquiring memory skills for improved working memory based on storage in long-term memory. World record digit span memory At the end of the list, we are more likely to remember the words structure, theory, and variable than the words in the middle columns. memory athlete Lance Tschirhart broke the World Record in spoken numbers (digit span). Most people manage to recap around seven digits. consider the performance of memory competitors on the same task: U.S. Teachers at all grade levels have embraced the occasion as a chance to break from routine and ignite in Figure 1. Right afterwards, the test subject has to recall the correct digits in the same order. Recitation of pi from memory is widely encouraged by teachers as part of the celebration of Pi Day, an annual holiday first observed in 1988 whose date, March 14, corresponds to the number’s first three digits: 3.14 (Bialik, 2011). FW's superiority over previous digit span experts is explained by his acquisition of well-known mnemonic techniques and his training that focused on rapid memorisation. The average person can only remember 7 digit numbers reliably, but it's possible to do much better using mnemonic techniques. The digit span test is a way of measuring the storage capacity of a person’s working memory: A testperson is visually or auditorily exposed to a sequence of digits one after the other. Further experiments used self-paced memorisation to identify temporal characteristics of encoding of digits in 4-digit clusters (Experiment 2), and explored memory encoding at presentation speeds much faster than 1 digit/s (Experiment 3). First FW reproduced his superior memory span of 200 digits under laboratory condition, and we obtained his retrospective reports describing his encoding/retrieval processes (Experiment 1). In several studies we examined FW's memory skills underlying his exceptional performance. These constraints seemed to be violated by a world-class memorist, Feng Wang (FW), who won the World Memory Championship by recalling 300 digits presented at 1 digit/s. Experimental analyses of their memory skills suggested that their attained memory spans were constrained by the encoding time, for the time needed will increase if the length of digit sequences to be memorised becomes longer. Laboratory studies have investigated how individuals with normal memory spans attained digit spans over 80 digits after hundreds of hours of practice.