JimPropp Add us as a preferred source on Google
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Followers
322
Account age
9 yrs
💰 Suggested sponsorship rate
$40 – $65 / sponsored post
Estimated from audience size & typical reach — every deal is negotiable and held in SocialDB escrow.
🎁 Free analysisfor JimPropp
Known for
22 views
In my latest Mathematical Enchantments essay, Seventeen Camels and Where They Can Take You, six seemingly unrelated brain-teasers can be solved using a single elegant trick. https://mathenchant.wordpress.com/2026/06/15/seventeen-camels-and-where-they-can-take-you/
12 views
I'm delighted to report that I've been chosen to be a Radcliffe Institute Fellow for 2026-2027. I'll spend the year conducting research on tilings and completing a first draft of my book "What Can Numbers Be?: The Further, Stranger Adventures of Plus and Times". https://www.radcliffe.harvard.edu/news-and-ideas/harvard-radcliffe-institute-announces-2026-2027-fellows
7 views
The green loop has constant length.
6 views
In this month's Mathematical Enchantment, a math-and-science writer named Jim Propp, inhabiting a variant of the fictional Project Hail Mary universe, confesses to his pivotal role in the impending end of all life on Earth, and kind-of sort-of apologizes. https://mathenchant.wordpress.com/2026/04/18/sorry-mary/
📊 Post engagement
Recent posts · likes + reposts
Mar 12latest
7
Avg engagement / post
3–7
Typical post (engagement)
2.2%
Engagement vs followers
60/100
Consistent reach
Jun 2017
On Mastodon since
Half of recent posts land between 3 and 7 likes + reposts (median 6) — a dependable floor a sponsored post can count on.
🔥 Top post: In my latest Mathematical Enchantments essay, Seventeen Camels a · 22 likes + reposts
📊 Activity & format
Posting cadence
0.44 / week
A lower-frequency account — each post lands with more weight.
Content mix
Mostly images
Recent: 3 text · 8 image · 1 video.
Follower / following
32×
Follows 10 back. A strong ratio — an audience that follows them, not a follow-for-follow network.
Recent posts
View on Mastodon ↗
🔥 Top post
In my latest Mathematical Enchantments essay, Seventeen Camels and Where They Can Take You, six seemingly unrelated brain-teasers can be solved using a single elegant trick. https://mathenchant.wordpress.com/2026/06/15/seventeen-camels-and-where-they-can-take-you/
The inspiration for this came from Chuck Hoberman's "Nested Loops" exhibit, now on display at the Museum of Mathematics. I used ChatGPT to search the space of possible solutions in which total length doesn't change (I'm pretty sure that "N…
▶
The green loop has constant length.
David Kelly is no longer with us (see https://mathenchant.wordpress.com/2025/06/17/remembering-kelly/) but Yellow Pig Seventeen lives on!
The world's worst way of writing the integer four just dropped. See my latest Mathematical Enchantment, "What Bad Bases Are Good For": https://mathenchant.wordpress.com/2026/07/19/what-bad-bases-are-good-for/
To take it a step farther, consider joining the \begin{proof} community:
https://www.begin-proof.com/
Consider signing the Leiden Declaration:
https://leidendeclaration.ai/
I'm delighted to report that I've been chosen to be a Radcliffe Institute Fellow for 2026-2027. I'll spend the year conducting research on tilings and completing a first draft of my book "What Can Numbers Be?: The Further, Stranger Adventu…
The first half is a mathematically correct discussion of models of growth (exponential vs. logistic) in a fictional context. The second half uses the same scenario to show that sometimes there are more important things than being mathemati…
In this month's Mathematical Enchantment, a math-and-science writer named Jim Propp, inhabiting a variant of the fictional Project Hail Mary universe, confesses to his pivotal role in the impending end of all life on Earth, and kind-of sor…
Learn how a stupid question led to an interesting, albeit spectacularly useless, way to estimate pi by tossing a coin many, many times, in this month's Mathematical Enchantments essay, "In Praise of Stupid Questions". https://mathenchant.w…
Of course, I’m not satisfied with five. Can anyone suggest a sixth source of “hexagons in the wild” here? The parking garage at Kendall Square Cinema tempted me, but it’s kind of a stretch to say it’s in-and-around Harvard Square.
▶
The green loop has constant length.
David Kelly is no longer with us (see https://mathenchant.wordpress.com/2025/06/17/remembering-kelly/) but Yellow Pig Seventeen lives on!
The world's worst way of writing the integer four just dropped. See my latest Mathematical Enchantment, "What Bad Bases Are Good For": https://mathenchant.wordpress.com/2026/07/19/what-bad-bases-are-good-for/
To take it a step farther, consider joining the \begin{proof} community:
https://www.begin-proof.com/
Consider signing the Leiden Declaration:
https://leidendeclaration.ai/
I'm delighted to report that I've been chosen to be a Radcliffe Institute Fellow for 2026-2027. I'll spend the year conducting research on tilings and completing a first draft of my book "What Can Numbers Be?: The Further, Stranger Adventu…
The first half is a mathematically correct discussion of models of growth (exponential vs. logistic) in a fictional context. The second half uses the same scenario to show that sometimes there are more important things than being mathemati…
In this month's Mathematical Enchantment, a math-and-science writer named Jim Propp, inhabiting a variant of the fictional Project Hail Mary universe, confesses to his pivotal role in the impending end of all life on Earth, and kind-of sor…
Learn how a stupid question led to an interesting, albeit spectacularly useless, way to estimate pi by tossing a coin many, many times, in this month's Mathematical Enchantments essay, "In Praise of Stupid Questions". https://mathenchant.w…
Of course, I’m not satisfied with five. Can anyone suggest a sixth source of “hexagons in the wild” here? The parking garage at Kendall Square Cinema tempted me, but it’s kind of a stretch to say it’s in-and-around Harvard Square.
🐘 Community & instance
Home server
mathstodon.xyz
Their home server on the fediverse — the instance a creator picks signals the community they belong to.
On Mastodon since
Jun 2017
An OG fediverse account from Mastodon's early years — a long, established presence.
💡 Facts
🗓️Joined Mastodon in 2017 — 9 years ago.
👁️Averages 7 views per post.
📤Posts about 0.4× per week.
🕵️ Fake follower check
Estimated80/100
Excellent
Credibility score
97%
Real
Real audience
Low
Fake-follower risk
High
Data confidence
- Est. 97% real, active audience · Low fake-follower risk.
- Strong engagement (~2.2% of followers engage each post) — an active, real audience.
- Established account (9+ years old).
Heuristic estimate from engagement, follower ratios, account age & growth — a screening signal, not a guarantee.
📸 Gallery
🔀 Audience overlap
EstimatedEstimated shared audience with similar creators — useful for avoiding overlap (or doubling down) when planning a campaign.
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