#ErdősNumber

Live, measured metrics for the hashtag #ErdősNumber from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #erdosnumber

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$10.85/ year · 11-character #name
Claim #erdosnumber — $10.85/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
0
Uses / 7 days
Mastodon
0
Accounts / 7 days
Mastodon
12
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 12
1.7
Avg reactions / post
Mastodon · last 12
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · mastodon.social (Mastodon public tags API) · fetched 2026-10-31 05:12 UTC
0
10-25
0
10-26
0
10-27
0
10-28
0
10-29
0
10-30
0
10-31

0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · mastodon.social (Mastodon public search API) · fetched 2026-10-31 05:12 UTC
#ErdősNumber
0 uses · 0 accounts / 7d
#ErdösNumbers
0 uses · 0 accounts / 7d

Live pulse

measured · mastodon.social (Mastodon tag timeline) · fetched 2026-10-31 05:12 UTC

Everything below is measured over the latest 12 public posts (spanning ~34992 hours).

Posting hours (UTC) — busiest: 04:00

00:0012:0023:00

Languages: English (9) · German (3)

Avg boosts / post: 0.5

Top of the latest posts

  • believe it or not, it's true https://en.wikipedia.org/wiki/Erdos_number #mathematics #numbertheory #erdosnumber

    James Endres Howell@[email protected]♥ 9↻ 22026-04-16 02:14 UTCView post →

  • ME: [dreaming] "Okay team, please double-check my math on this, but...I think we've done it: We've officially discovered a new Erdős number!" ME: [waking up] "Wait... that's not how Erdős numbers work." #ErdosNumber #PaulErdos #Math #DreamJ

    Peter Kisner ≈@[email protected]♥ 5↻ 22026-10-23 04:13 UTCView post →

  • Durch Berthold Crysmann habe ich einen neuen Weg zu meiner #ErdosNumber 4 gefunden: 0 Paul Erdős 1 Patrick Eugene O'Neill 2 Gerhard Weikum 3 Ulrich Schäfer/Hans Uszkoreit 4 Stefan Müller (An Integrated Archictecture for Shallow and Deep Pro

    Stefan Müller :verified:@[email protected]♥ 5↻ 02025-09-03 10:21 UTCView post →

#erdosnumber across platforms

every network with a public tag surface

Follow #erdosnumber straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/erdosnumber