Rules

1.What you can enter

1. 1.1

   You can enter recitations of pi (π). Recitation while juggling has its own list.

2. 1.2

   The minimum listed result is 50 decimal places.

3. 1.3

   Only decimal places count. The leading 3 is not counted.

4. 1.4

   Anyone of any age, from any country, may enter. Entrants under 18 enter through a parent or guardian (see Privacy and minors).

2.Scoring

1. 2.1

   You recite the digits in order, starting from the first decimal place.

2. 2.2

   Each digit is compared with the reference digits of pi.

3. 2.3

   Your score is the number of correct digits before the first wrong digit. Digits after the first error do not count, even when they are correct.

4. 2.4

   A spoken digit is final. Corrections are not accepted.

5. 2.5

   Skipping, repeating, or swapping a digit counts as an error at that position.

3.During the attempt

1. 3.1

   You recite from memory only. No notes, screens, earpieces, or prompts from anyone.

2. 3.2

   You may speak, write, or type the digits. A typing device shows nothing but your own input and stays visible on camera.

3. 3.3

   A gap of more than 15 seconds between two digits ends the attempt at the last digit before the gap.

4. 3.4

   Attempts longer than one hour may include one break of up to 10 minutes per full hour. You stay on camera or with your witnesses, with no access to any material, and you write down your stopping position on camera or in front of them.

4.Proving the attempt

What an attempt needs depends on how many digits you claim.

1. 4.1

   Under 1,000 digits: a video, or two witnesses. Either one is enough on its own.

2. 4.2

   From 1,000 digits: two witnesses who both represent one host organization, such as a school, a university, or a pi, math, or memory group. A video is welcome, but it doesn’t replace them.

3. 4.3

   From 10,000 digits: two witnesses from one host organization, a video, and a Pi Records adjudicator watching live.

4. 4.4

   Witnesses are adults who are present for the whole attempt and not related to you. One follows the reference digits and marks the first error. Each confirms a short statement by email.

5.Video

1. 5.1

   A video is one continuous, unedited take. If the recording stops, the attempt ends at the last digit captured. You may speak, write, or type the digits.

2. 5.2

   Your face, both hands, and both ears stay visible for the whole attempt.

3. 5.3

   At the start, the camera shows the whole room, the desk, and the space behind the camera.

4. 5.4

   At the start, you show the current date, then turn that device off and put it out of reach.

5. 5.5

   Every digit is clearly audible, or clearly visible if you write or type.

6. 5.6

   With the video, you send a transcript of the digits you recited, with a timestamp every 1,000 digits, such as “digit 5000 at 00:41:12”.

7. 5.7

   The video stays available for as long as the record stands. If it disappears, the record shows as Unavailable until you restore it.

6.Review

The bigger the claim, the stricter the review. The tier appears next to the record on every list.

1. 6.1

   A reviewer checks the video against the transcript, or, without a video, the two witnesses’ statements.

2. 6.2

   An adjudicator is a Pi Records reviewer who watches the attempt live, in person or by video call, and is never related to or coaching the performer.

7.Review outcomes

1. 7.1

   Accepted: the record appears at its reviewed score.

2. 7.2

   Accepted at a lower score: the reviewer found an earlier error. You learn the position of the first error.

3. 7.3

   Not accepted: the attempt breaks a rule, and the reviewer names the rule.

8.Challenges

1. 8.1

   Anyone can challenge an accepted record with specific evidence, such as a timestamp in the video or a witness’s account.

2. 8.2

   A reviewer who did not review the original attempt examines the challenge.

3. 8.3

   If the challenge holds, the record moves to its corrected score or comes off the list.

9.Legacy records

1. 9.1

   Records imported from the Pi World Ranking List carry the Legacy label and are credited to that list.

2. 9.2

   Legacy and new records share one ranking, so existing record holders keep their place.

3. 9.3

   A legacy record holder can make a new attempt under these rules. Once accepted, it replaces the legacy entry.

10.Privacy and minors

1. 10.1

   Your name, country, digits, date, and time appear on the list. Contact details for you and your witnesses stay private and serve only to verify the attempt.

2. 10.2

   For entrants under 18, a parent or guardian confirms the attempt. The name appears as first name and last initial, or initials only. A full name appears only when a parent or guardian asks for it in writing and Pi Records approves it.

3. 10.3

   Entrants under 13 need a parent or guardian to submit, as US children’s privacy law (COPPA) requires.