MATH 4430 Introduction to Number Theory

Topics include divisibility, unique factorization, congruences, number-theoretic functions, primitive roots, diophantine equations, continued fractions, quadratic residues and the distribution of primes. Historical background for various problems and examples useful in the secondary school curriculum will be presented.

Course overview

Department
Mathematics
School
MCAS
Credits
3
Level
Undergraduate
Offered
Every Spring

Catalog details

Prerequisites
MATH2216

Catalog text is imported from the reviewed Boston College course snapshot. Confirm eligibility in EagleApps.

Requirements fulfilled

Requirement eligibility can vary by school, cohort, and section. Confirm the selected section in EagleApps or with an advisor.

Course evaluations

Response-weighted averages from Boston College’s official course evaluations (Avalanche/Blue).

Course rating
3.90 / 5 · Very Good
116 responses
Instructor rating
4.02 / 5 · Very Good
116 responses
Terms evaluated
5
Most recent: Spring 2026

Scales: overall ratings run from 1 (poor) to 5 (excellent); agreement questions from 1 (strongly disagree) to 5 (strongly agree); weekly effort from 1 (up to 1 hour) to 5 (10 or more hours).

Evaluations by term and instructor
TermInstructorCourse overallInstructor overallWell organizedClear learning objectivesIntellectually challengingHelpful assignmentsApplicable beyond courseAttendance necessaryWeekly effortResponses
Spring 2026Avner Ash3.84.14.24.34.84.84.24.14–6 hrs/week21 of 26
Spring 2025Avner Ash3.84.24.24.34.84.64.24.74–6 hrs/week26 of 32
Spring 2024Dubi Kelmer4.03.84.34.34.54.54.34.04–6 hrs/week20 of 27
Spring 2023Ioannis Zachos4.14.34.54.54.54.64.24.44–6 hrs/week29 of 34
Spring 2022Dubi Kelmer3.63.64.34.24.64.33.84.07–9 hrs/week20 of 32

Data freshness

Course and evaluation data last updated 2026-10-09. Source details and limitations are documented in Data Sources and Methodology.

Instructors

  • Dubi Kelmer
    Spring 2027, Spring 2024, Spring 2022 · Official rating 3.74/5
  • Avner Ash
    Spring 2026, Spring 2025 · Official rating 4.12/5
  • Ioannis Zachos
    Spring 2023 · Official rating 4.25/5

Sections

  • Section 01
    Spring 2027 · Dubi Kelmer · Fulton Hall 230 MWF 12:00 Noon-12:50PM · Offered